[unittests] Disable RegionAllocatorTest

Bug: chromium:1043117
Change-Id: I09faf069e787ae3c5ecc0fd38b4bb55d51f10acf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2007501
Auto-Submit: Nico Hartmann <nicohartmann@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65859}

test/unittests/unittests.status

@@ -3,6 +3,12 @@
 # found in the LICENSE file.
 
 [
+[ALWAYS, {
+  # BUG(1043117)
+  'RegionAllocatorTest': [SKIP],
+}],  # ALWAYS
+
+##############################################################################
 ['system == macos and asan', {
   # BUG(820416).
   'BitsDeathTest*': [SKIP],