When looking at Code objects from the compiler, we inquire whether
the object is on a read only page. In TSAN builds, it's necessary
to reload the memory because TSAN can't detect the safety of the
operation.

Fixed: v8:11590
Change-Id: Iaedd6e3f9f22241d4ef778f53a0405eaac8f76b6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2778276Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73571}