This reverts commit 7c426286.

Reason for revert: Compile error on cfi: https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64%20-%20cfi/20196

Original change's description:
> [heap] Use normal marking write barrier for fixed array elements
> 
> This simplifies the marking write barrier for elements to mark the
> values instead of revisiting the array.
> 
> Bug: chromium:918485
> 
> Change-Id: Id5da0d5b9ff8385a256fe14f4bf7171f9f6343e1
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1588459
> Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Hannes Payer <hpayer@chromium.org>
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#61125}

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

Change-Id: I8576fe00b19db906aa80ca9cb54c3b8cc95e3d97
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:918485
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1590076Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61128}