Replace Heap::IsGCWithoutStack() with Heap::IsGCWithStack() to avoid
double-negation.

Bug: chromium:1359294, v8:12578
Change-Id: I8f2e9feb48e574fae6a7721f86a70728b089ec67
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3878170
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#83037}