Skip debug-stepout-scope on tsan/stress

Bug: v8:7626
Change-Id: Ifd6908941b7bc62357c3577bea4a097c45903129
Reviewed-on: https://chromium-review.googlesource.com/998167Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52453}

test/debugger/debugger.status

@@ -41,6 +41,10 @@
 
   # Very slow in stress mode.
   'regress/regress-2318': [SKIP],
+
+  # https://crbug.com/v8/7626
+  'debug/debug-stepout-scope-part1': [PASS, ['tsan', SKIP]],
+  'debug/debug-stepout-scope-part2': [PASS, ['tsan', SKIP]],
 }],  # variant == stress
 
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