[test] remove flaky isOptimized check in regress-crbug-1323114.js

Bug: v8:12893
Change-Id: Ibc2068011243b2ec811cd90646f0ec2a0d93cc05
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3657433
Auto-Submit: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#80671}

test/mjsunit/mjsunit.status

@@ -407,6 +407,9 @@
 
   # BUG(v8:12561)
   'spread-large-map': [SKIP],
+
+  # Flaky tests due to GC interferring with optimization.
+  'compiler/regress-crbug-1323114': [SKIP],
 }],  # 'gc_stress'
 
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