[heap] Ignore SpacesTest.WriteBarrierFromHeapObject

The test creates a new spaces without hooking it up into Heap, which
makes allocations crash.

Tbr: leszeks@chromium.org
No-try: true
Bug: v8:7984
Change-Id: I58c43eedd4fbbedfacfdee3a3bae99c4107404ec
Reviewed-on: https://chromium-review.googlesource.com/1151112Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54713}

test/unittests/unittests.status

@@ -3,6 +3,12 @@
 # found in the LICENSE file.
 
 [
+
+[ALWAYS, {
+  # BUG(v8:7984).
+  'SpacesTest.WriteBarrierFromHeapObject': [SKIP],
+}], # ALWAYS
+
 ['system == macos and asan', {
   # BUG(820416).
   'BitsDeathTest*': [SKIP],