Port 642a4673

Original Commit Message:

    If a GC happens between Code object allocation and Code finalization,
    we might have invalid embedded object references. We fallback and patch
    the refernces back to handles, then unbox the handles and relocate.

R=victorgomes@chromium.org, joransiu@ca.ibm.com, junyan@redhat.com, midawson@redhat.com
BUG=
LOG=N

Change-Id: I680cc33fa9d06d7a00cc52c142599bb5536a9b88
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3060487Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#76004}