This is a quick fix that guards the NotifyOldGenerationExpansion call,
which is not thread-safe outside GC.

Bug: v8:10536
Change-Id: Iff42fee24242c2e88e0c814ae41766e97181324a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2204037Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67821}