HeapNumberRef can be serialized in the background, so long as we record
a dependency to check at the end of compilation to ensure that the
number (interpreted as bits) has not changed.

Bug: v8:7790
Change-Id: I5c1c27466192580ff33bd55c8fa44dac957f2171
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2872827
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74423}