This reverts commit 2b77aaf4.

Reason for revert: https://ci.chromium.org/p/v8/builders/luci.v8.ci/V8%20Linux64%20-%20cfi/18836

Original change's description:
> [global-handles] Restructure GC post processing
> 
> Bug: chromium:923361
> Change-Id: I97a0314b6d5af543e0574f27892c73637739844d
> Reviewed-on: https://chromium-review.googlesource.com/c/1426124
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#58984}

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

Change-Id: I8220c60573cf7f4a1ced99bcd18628933c45f41e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:923361
Reviewed-on: https://chromium-review.googlesource.com/c/1425901Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58985}