[compiler] Fix data race in TryGetPropertyCell

Bug: v8:7790, chromium:1225521
Change-Id: I4210ca9d3eccdc4de0b5b865bac37dc32b8e6f17
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2999085


Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Auto-Submit: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75499}