It was never stored with a release store, so can we use the loads as
non-atomic ones.

Bug: v8:7790
Change-Id: Ife67e8650a5fb279ad808e5e68c2ab46ee3507c5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2880541Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74493}