Replace python3 with vpython in bot_update/api.py

For context see comments 5 and 6 here: https://bugs.chromium.org/p/chromium/issues/detail?id=1298922#c6

Recipe-Nontrivial-Roll: build
Recipe-Nontrivial-Roll: build_limited
Recipe-Nontrivial-Roll: chrome_release
Recipe-Nontrivial-Roll: chromiumos
Recipe-Nontrivial-Roll: infra
Bug: chromium:1298922
Change-Id: I23eaec3c104c7b52653732b6fd9d58d175d78069
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/3489327Reviewed-by: Josip Sokcevic <sokcevic@google.com>
Commit-Queue: Ravi Mistry <rmistry@chromium.org>

recipes/recipe_modules/bot_update/api.py

@@ -43,7 +43,7 @@ class BotUpdateApi(recipe_api.RecipeApi):
     with self.m.context(env=env):
       with self.m.depot_tools.on_path():
         return self.m.step(name,
-                           ['python3', '-u', bot_update_path] + cmd,
+                           ['vpython3', '-u', bot_update_path] + cmd,
                            **kwargs)
 
   @property

recipes/recipe_modules/bot_update/examples/full.expected/add_blamelists.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/add_blamelists_bot_update_failure.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/basic.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/basic_with_branch_heads.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/bot_update_failure.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/clobber.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
@@ -112,7 +112,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/deprecated_got_revision_mapping.json

@@ -56,7 +56,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
@@ -145,7 +145,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/gerrit_no_rebase_patch_ref.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
@@ -112,7 +112,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/gerrit_no_reset.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
@@ -112,7 +112,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/input_commit_with_id_without_repo.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
@@ -122,7 +122,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/multiple_patch_refs.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
@@ -115,7 +115,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/no_apply_patch_on_gclient.json

@@ -56,7 +56,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
@@ -185,7 +185,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/no_cp_checkout_HEAD.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/no_cp_checkout_a_branch_head.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/no_cp_checkout_a_specific_commit.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/no_cp_checkout_main.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/origin_main.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/refs.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
@@ -113,7 +113,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/reset_root_solution_revision.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
@@ -111,7 +111,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/resolve_chromium_fixed_version.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/revision_fallback_chain_set_output_commit.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/revision_specifying_ref.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/tryjob_fail.json

@@ -56,7 +56,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/tryjob_fail_patch.json

@@ -56,7 +56,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/tryjob_fail_patch_download.json

@@ -56,7 +56,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/tryjob_gerrit_angle.json

@@ -56,7 +56,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
@@ -185,7 +185,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/tryjob_gerrit_branch_heads.json

@@ -56,7 +56,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
@@ -184,7 +184,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/tryjob_gerrit_feature_branch.json

@@ -56,7 +56,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
@@ -184,7 +184,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/tryjob_gerrit_v8_feature_branch.json

@@ -56,7 +56,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
@@ -185,7 +185,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/tryjob_gerrit_webrtc.json

@@ -56,7 +56,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
@@ -195,7 +195,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/tryjob_v8.json

@@ -56,7 +56,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
@@ -185,7 +185,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/tryjob_v8_head_by_default.json

@@ -56,7 +56,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
@@ -185,7 +185,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/with_experiments.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
@@ -112,7 +112,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",

recipes/recipe_modules/bot_update/examples/full.expected/with_tags.json

 [
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
@@ -112,7 +112,7 @@
   },
   {
     "cmd": [
-      "python3",
+      "vpython3",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",