[infra] Add a no-local-heaps test variant

This is needed for preserving test coverage for the mode that runs
without local heaps. Flags that depend on --local-heaps are also
disabled in this variant.

Bug: v8:10828
Change-Id: I4a3b219e5235945278d8356f4efd886a97ffa16a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2404456
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69930}

infra/testing/builders.pyl

@@ -258,6 +258,7 @@
       {'name': 'test262', 'shards': 7},
       {'name': 'v8testing', 'shards': 3},
       {'name': 'v8testing', 'variant': 'extra', 'shards': 3},
+      {'name': 'v8testing', 'variant': 'no_local_heaps'},
       {'name': 'v8testing', 'variant': 'slow_path'},
     ],
   },
@@ -420,6 +421,7 @@
       {'name': 'test262', 'variant': 'default', 'shards': 3},
       {'name': 'v8testing', 'shards': 5},
       {'name': 'v8testing', 'variant': 'extra', 'shards': 3},
+      {'name': 'v8testing', 'variant': 'no_local_heaps'},
       {'name': 'v8testing', 'variant': 'slow_path'},
     ],
   },
@@ -1121,6 +1123,7 @@
       {'name': 'test262', 'shards': 5},
       {'name': 'v8testing', 'shards': 2},
       {'name': 'v8testing', 'variant': 'extra', 'shards': 2},
+      {'name': 'v8testing', 'variant': 'no_local_heaps', 'shards': 1},
       {'name': 'v8testing', 'variant': 'slow_path', 'shards': 1},
     ],
   },
@@ -1146,6 +1149,7 @@
       {'name': 'test262', 'variant': 'default', 'shards': 3},
       {'name': 'v8testing', 'shards': 5},
       {'name': 'v8testing', 'variant': 'extra', 'shards': 3},
+      {'name': 'v8testing', 'variant': 'no_local_heaps', 'shards': 1},
       {'name': 'v8testing', 'variant': 'slow_path', 'shards': 1},
     ],
   },

tools/testrunner/local/variants.py

@@ -18,6 +18,10 @@ ALL_VARIANT_FLAGS = {
   "nci": [["--turbo-nci"]],
   "nci_as_midtier": [["--turbo-nci-as-midtier"]],
   "no_lfa": [["--no-lazy-feedback-allocation"]],
+  "no_local_heaps": [[
+      "--no-local-heaps",
+      "--no-turbo-direct-heap-access",
+      "--no-finalize-streaming-on-background"]],
   # No optimization means disable all optimizations. OptimizeFunctionOnNextCall
   # would not force optimization too. It turns into a Nop. Please see
   # https://chromium-review.googlesource.com/c/452620/ for more discussion.