[test] Disable slow mozilla tests on Windows

Bug: v8:12558
Change-Id: Ib615c192a0ec6bc7c8ee8b0ee0f393092a5dedb4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3401590
Auto-Submit: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78700}

test/mozilla/mozilla.status

@@ -220,8 +220,8 @@
   ##################### FLAKY TESTS #####################
 
   # BUG(v8:12558): These tests time out on Windows and also in debug mode.
-  'js1_5/Regress/regress-360969-05': [PASS, SLOW, ['mode == debug', NO_VARIANTS], ['system == windows', NO_VARIANTS]],
-  'js1_5/Regress/regress-360969-06': [PASS, SLOW, ['mode == debug', NO_VARIANTS], ['system == windows', NO_VARIANTS]],
+  'js1_5/Regress/regress-360969-05': [PASS, SLOW, ['mode == debug', NO_VARIANTS], ['system == windows', SKIP]],
+  'js1_5/Regress/regress-360969-06': [PASS, SLOW, ['mode == debug', NO_VARIANTS], ['system == windows', SKIP]],
 
   # These tests time out in debug mode but pass in product mode
   'js1_5/extensions/regress-365527': [PASS, SLOW, ['mode == debug', NO_VARIANTS]],