[test] Skip slow test in stress mode

TBR=herhut@chromium.org
NOTRY=true

Bug: v8:8164
Change-Id: Ifcf4b7bce70b8dd1c4aba129a9061dfb6056474e
Reviewed-on: https://chromium-review.googlesource.com/1226612Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55882}

test/mjsunit/mjsunit.status

@@ -800,6 +800,9 @@
 
   # Too memory hungry on Odroid devices.
   'regress/regress-678917': [PASS, ['arch == arm and not simulator_run', SKIP]],
+
+  # https://crbug.com/v8/8164
+  'wasm/compare-exchange-stress': [SKIP],
 }],  # variant == stress
 
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