Skip mjsunit/shared-memory/shared-struct-atomics-workers under stress_snapshot

Bug: v8:12749
Change-Id: I33d0313625c38f9634ffba5ed358c1782811ddde
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3561184
Commit-Queue: Adam Klein <adamk@chromium.org>
Auto-Submit: Adam Klein <adamk@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#79680}

test/mjsunit/mjsunit.status

@@ -1460,6 +1460,8 @@
   # Script referenced only through context-dependent SourceTextModule
   # https://bugs.chromium.org/p/v8/issues/detail?id=11073
   'tools/processor': [SKIP],
+  # https://crbug.com/v8/12749
+  'shared-memory/shared-struct-atomics-workers': [SKIP],
 }],  # variant == stress_snapshot and arch == x64
 
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