This reverts commit dec62c2d.

Reason for revert: bot failures

Original change's description:
> heap: Factor out raw allocation functions into HeapAllocator
>
> This CL is mostly mechanic and provides runtime and static
> dispatch for allocation of objects using HeapAllocator.
>
> Future CLs will remove the Heap bottelenecks.
>
> Bug: v8:12615
> Change-Id: Id2becf7da4bd5273f96abc0e1a4ac6c04bddb1cb
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3474674
> Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#79229}

Bug: v8:12615
Change-Id: I55bf6c6a857d853462b11251e767c44fc6fa2edd
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3483665
Auto-Submit: Tobias Tebbi <tebbi@chromium.org>
Owners-Override: Tobias Tebbi <tebbi@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@{#79231}