This reverts commit 924be695.

Reason for revert: speculative revert for TSAN failures:
https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux64%20TSAN%20-%20stress-incremental-marking/8726/overview

Original change's description:
> [heap] Use PagedNewSpace when MinorMC is enabled
>
> This CL also introduces/updates DCHECKs that some methods are never
> reached with MinorMC (they may still be reached by full GC when MinorMC
> is disabled).
>
> Bug: v8:12612
> Change-Id: I8afb8c964bc5c44225a92d0f8d9ac5a4c0ecef75
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3823130
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Commit-Queue: Omer Katz <omerkatz@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#82439}

Bug: v8:12612
Change-Id: I540f38fea17fbacffbd120dd050626d7d1ec32f3
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3827039
Auto-Submit: Adam Klein <adamk@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#82446}