Most of Map's bit_field (as in not 2 or 3) accessors are not set after
construction e.g. is_callable. They are also not used as a
synchronization point. From the compiler's point of view, they can be
set as non-atomic. There are two accessors (`prototype_slot` and
`non_instance_prototype`) that have to be atomic for concurrent marker
reasons (relaxed is fine for them).

Bug: v8:7790, chromium:1150811
Change-Id: Ic3c81a59e7895ee9c35a128bb10656040b19dd42
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2752154Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73432}