This is a reland of 6747144c

Original change's description:
> cppgc: Parallel marking in atomic pause
>
> Bug: v8:12424
> Change-Id: I0633e1bd8c890c14ce2c5519253a5e6eb7592f04
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3295580
> Commit-Queue: Omer Katz <omerkatz@chromium.org>
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#78081}

Bug: v8:12424
Change-Id: I66a030b4e66647a76bbe3d114785d3052358b403
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3301477Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78092}