[wasm] Skip test that times out on gc-stress

Similar tests are already skipped on tsan, using the same bug to also
skip this test. Note that it's a slightly different test, but based on
the same "worker-ping-test.js".

TBR=ahaas@chromium.org

Bug: v8:9506
Change-Id: Ie8d0aab5b1fd3ae6c77a65fa04ac4772b2836a1c
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2267301Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68548}

test/mjsunit/mjsunit.status

@@ -307,6 +307,9 @@
 
   # BUG(v8:10035)
   'compiler/deopt-array-builtins': [SKIP],
+
+  # BUG(v8:9506): times out.
+  'harmony/sharedarraybuffer-worker-gc-stress': [SKIP],
 }],  # 'gc_stress'
 
 ##############################################################################