[test] Mark slow test

Led to time-outs and tree closure:
https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64%20TSAN/36738

No-Try: true
Change-Id: Ia1e5294cf823429d4917b30b6478231a64c81b7f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2897252
Auto-Submit: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Liviu Rau <liviurau@chromium.org>
Reviewed-by: Liviu Rau <liviurau@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74582}

test/mjsunit/mjsunit.status

@@ -598,12 +598,13 @@
 
   # Slow tests.
   'compiler/regress-1125145': [SKIP],
+  'compiler/regress-crbug-11564': [PASS, SLOW],
   'es6/block-conflicts-sloppy': [PASS, SLOW],
   'math-floor-part1': [PASS, SLOW],
   'regress/regress-430201': [SKIP],
   'regress/regress-500980': [PASS, SLOW],
+  'regress/regress-crbug-941743': [PASS, SLOW],
   'wasm/shared-memory-worker-stress': [PASS, SLOW],
-  'compiler/regress-crbug-11564': [PASS, SLOW],
 
   # BUG(v8:9506): times out.
   'wasm/shared-memory-worker-explicit-gc-stress': [SKIP],