This is the 3. CL in a series of CollectGarbage refactoring CLs.

Bug: v8:12503
Change-Id: Icc578eb9a4dc06083ea3380a00a50dbdbfd22e34
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3420908Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Hannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78949}