[test] Skip flaky cctest OutOfMemorySmallObjects

Skipping on all platforms, as it started appearing regularly.

Bug:v8:8296

NOTRY=true

TBR=machenbach@chromium.org

Change-Id: Ia43ece07af5ed5f0767fad9651be30b2cd3563f2
Reviewed-on: https://chromium-review.googlesource.com/c/1276633Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56575}

test/cctest/cctest.status

@@ -128,6 +128,9 @@
   'test-serialize/SnapshotCreatorNoExternalReferencesCustomFail1': [FAIL],
   'test-serialize/SnapshotCreatorNoExternalReferencesCustomFail2': [FAIL],
 
+  # BUG(v8:8296). Flaky OOM test.
+  'test-heap/OutOfMemorySmallObjects': [SKIP],
+
   ############################################################################
   # Slow tests.
   'test-debug/CallFunctionInDebugger': [PASS, ['mode == debug', SLOW]],