Upcoming CLs will need atomic accessors for non-smi values. This CL
adds the full set of relaxed and acquire/release indexed accessors,
and I also take the opportunity to update the old
`synchronized_set(i, v)` style to `set(i, v, ReleaseStoreTag)`.

Bug: v8:7790
Change-Id: Ic4fa4ec52319ec943415f0e9ae515a00b04cbbc3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2717305
Auto-Submit: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72995}