[wasm] Skip slow test on tsan

Even though we sped up the test since the first landing of the CL, it
still sometimes times out on TSan. Since TSan coverage is not needed for
this test, just skip it.

R=adamk@chromium.org

Bug: v8:11369
Change-Id: I7825d1824ad34fccc313459a115b38eae1d5b553
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2659262
Commit-Queue: Adam Klein <adamk@chromium.org>
Auto-Submit: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72437}

test/inspector/inspector.status

@@ -128,6 +128,10 @@
 ['tsan == True', {
   # TSan handles SIGPROF incorrectly (https://crbug.com/v8/9869).
   'cpu-profiler/console-profile-wasm': [SKIP],
+
+  # This test is just slow on TSan, and TSan coverage is not needed to test
+  # that we do not run OOM. Thus skip it on TSan.
+  'debugger/wasm-step-a-lot': [SKIP],
 }],  # 'tsan == True'
 
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