[tests] Disable atomics stress test on predictable bots.

The atomics stress tests use shared array buffers to record
non-deterministic interleaving of execution in web workers. This
produces non-deterministic heap results even in predictable mode.

NOTRY=true

Change-Id: Ic41c53bb6f5c67393fed7b9670c13cee6bc3481b
Reviewed-on: https://chromium-review.googlesource.com/c/1290979
Commit-Queue: Stephan Herhut <herhut@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56819}

test/mjsunit/mjsunit.status

@@ -755,6 +755,9 @@
   'd8/enable-tracing': [SKIP],
   # Relies on async compilation which requires background tasks.
   'wasm/streaming-error-position': [SKIP],
+  # Intentionally non-deterministic using shared arraybuffers.
+  'wasm/atomics-stress': [SKIP],
+  'wasm/atomics64-stress': [SKIP],
 }],  # 'predictable == True'
 
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