[test] Increase shards for slow tests

To prevent timeouts on arm64-sim debug and gc-stress builder. Also
skip a very slow test on the arm64-sim gc-stress builder.

No-Try: true
Change-Id: I7d275aa893dbe4942b4d41c6e83d9b9e6f861a33
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3760455Reviewed-by: Adam Klein <adamk@chromium.org>
Auto-Submit: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81704}

infra/testing/builders.pyl

@@ -595,7 +595,7 @@
       {'name': 'mozilla', 'shards': 4},
       {'name': 'test262', 'variant': 'default', 'shards': 4},
       {'name': 'v8testing', 'shards': 14},
-      {'name': 'v8testing', 'variant': 'extra', 'shards': 12},
+      {'name': 'v8testing', 'variant': 'extra', 'shards': 14},
     ],
   },
   'v8_linux_arm64_gc_stress_dbg_ng_triggered': {
@@ -623,7 +623,7 @@
       {'name': 'mozilla', 'shards': 4},
       {'name': 'test262', 'variant': 'default', 'shards': 4},
       {'name': 'v8testing', 'shards': 14},
-      {'name': 'v8testing', 'variant': 'extra', 'shards': 12},
+      {'name': 'v8testing', 'variant': 'extra', 'shards': 14},
     ],
   },
   'v8_linux_arm64_cfi_rel_ng_triggered': {
@@ -1899,7 +1899,7 @@
       {'name': 'mozilla', 'shards': 2},
       {'name': 'test262', 'variant': 'default', 'shards': 2},
       {'name': 'v8testing', 'shards': 12},
-      {'name': 'v8testing', 'variant': 'extra', 'shards': 11},
+      {'name': 'v8testing', 'variant': 'extra', 'shards': 14},
     ],
   },
   'V8 Linux - arm64 - sim - gc stress': {
@@ -1915,7 +1915,7 @@
       {
         'name': 'd8testing',
         'test_args': ['--gc-stress', '--extra-flags=--verify-heap-skip-remembered-set'],
-        'shards': 5
+        'shards': 7
       },
     ],
   },

test/mjsunit/mjsunit.status

@@ -364,6 +364,7 @@
   'es6/regress/regress-crbug-465671-null': [SKIP],
   'regress/regress-148378': [SKIP],
   'regress/regress-crbug-762472': [SKIP],
+  'wasm/stringrefs-exec': [PASS, ['arch == arm64 and simulator_run', SKIP]],
 
   # BUG(v8:10035)
   'compiler/deopt-array-builtins': [SKIP],