This is a reland of d3b295fa

Got speculatively reverted in https://crrev.com/c/v8/v8/+/2403256 but
doesn't seem to have been causing the TSAN failures

Original change's description:
> [compiler] Replace Symbol with direct reads
>
> Bug: v8:7790
> Change-Id: I49120a6349777fd992a97d697940e79b2e71dbd1
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2400988
> Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#69812}

Bug: v8:7790
Change-Id: I459f4bfc881c641258dcc46fc55fce21f9e03dec
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2403921
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Auto-Submit: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69822}