[test] Mark non-extensible-array-reduce slow on arm64 sim

Change-Id: I5db858ea02d145aa8e934ee20f3a7fae78e39828
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1932364
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65143}

test/mjsunit/mjsunit.status

@@ -506,6 +506,7 @@
   'compiler/osr-big': [PASS, SLOW],
   'regress/regress-454725': [PASS, SLOW],
   'try': [PASS, SLOW],
+  'non-extensible-array-reduce': [PASS, SLOW],
 }],  # 'arch == arm64 and simulator_run'
 
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