Reland of [gn] Switch win clang bot to gn (patchset #1 id:1 of...

Reland of [gn] Switch win clang bot to gn (patchset #1 id:1 of https://codereview.chromium.org/2311853002/ )

Reason for revert:
Trying reland with plugin switched off.

Original issue's description:
> Revert of [gn] Switch win clang bot to gn (patchset #1 id:1 of https://codereview.chromium.org/2310863002/ )
>
> Reason for revert:
> Fails compilation:
> https://build.chromium.org/p/client.v8/builders/V8%20Win64%20-%20clang
>
> Original issue's description:
> > [gn] Switch win clang bot to gn
> >
> > BUG=chromium:474921
> > NOTRY=true
> >
> > Committed: https://crrev.com/1740587772bbd1ffb7b79a90deb16519e8d47588
> > Cr-Commit-Position: refs/heads/master@{#39156}
>
> TBR=jochen@chromium.org,vogelheim@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=chromium:474921
>
> Committed: https://crrev.com/49e13ea6eab4158915a75b95ccc9f01892924d9e
> Cr-Commit-Position: refs/heads/master@{#39158}

TBR=jochen@chromium.org,vogelheim@chromium.org
NOTRY=true
BUG=chromium:474921,chromium:644096

Review-Url: https://codereview.chromium.org/2312093002
Cr-Commit-Position: refs/heads/master@{#39201}

infra/mb/mb_config.pyl

@@ -52,7 +52,8 @@
         'gn_release_x86_no_snap_shared_minimal_symbols',
       'V8 Win64': 'gn_release_x64_minimal_symbols',
       'V8 Win64 - debug': 'gn_debug_x64_minimal_symbols',
-      'V8 Win64 - clang': 'gyp_release_x64_clang',
+      # TODO(machenbach): Switch plugins on when errors are fixed.
+      'V8 Win64 - clang': 'gn_release_x64_clang_no_plugins',
       # Mac.
       'V8 Mac': 'gn_release_x86',
       'V8 Mac - debug': 'gn_debug_x86',
@@ -254,6 +255,8 @@
     'gn_release_x64_asan_minimal_symbols': [
       'gn', 'release_bot', 'x64', 'asan', 'lsan', 'minimal_symbols',
       'swarming'],
+    'gn_release_x64_clang_no_plugins': [
+      'gn', 'release_bot', 'x64', 'clang', 'no_plugins', 'swarming'],
     'gn_release_x64_internal': [
       'gn', 'release_bot', 'x64', 'swarming', 'v8_snapshot_internal'],
     'gn_release_x64_minimal_symbols': [
@@ -385,8 +388,6 @@
       'v8_verify_heap'],
     'gyp_release_x64_cfi_symbolized': [
       'gyp', 'release_bot', 'x64', 'cfi', 'swarming', 'symbolized'],
-    'gyp_release_x64_clang': [
-      'gyp', 'release_bot', 'x64', 'clang', 'swarming'],
     'gyp_release_x64_gcc_coverage': [
       'gyp', 'release_bot', 'x64', 'coverage', 'gcc'],
 
@@ -519,6 +520,10 @@
                       'use_prebuilt_instrumented_libraries=1'),
     },
 
+    'no_plugins': {
+      'gn_args': 'clang_use_chrome_plugins=false',
+    },
+
     'release': {
       'gn_args': 'is_debug=false',
     },