This reverts commit 9d5ab51f.

Reason for revert: Blocks important revert. Also rolling is down
since 2 days... so please wait with relanding until rolling is
confirmed to be up again.
https://chromium-review.googlesource.com/c/v8/v8/+/1219695

Original change's description:
> Reland "[heap] Introduce backing store counters on Heap"
> 
> - Update those counters from space
> - Add fast path for move memory
> 
> Fix:
> - Introduce proper variants for checked arithmetic on atomics.
> 
> This reverts commit 0c62f5b3.
> 
> Bug: chromium:845409
> Change-Id: I98ad1a7c470c7e7b805e087b4ec74e3451344712
> Reviewed-on: https://chromium-review.googlesource.com/1219647
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#55815}

TBR=ulan@chromium.org,mlippautz@chromium.org

Change-Id: Ifb7c6e31f7f105bd11d1497a1061f73d42c05c31
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:845409
Reviewed-on: https://chromium-review.googlesource.com/1221186Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55816}