[baseline] Skip fix reference if no GC

If no GC happens when we grow the assembler buffer (this could happen
since we allocate a new Code object), we do not need to fix references
to full-embedded-objects.

Bug: v8:11872
Change-Id: I11fb1abcb4c53e124bb7659c9f9995ccb18cf296
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3073741


Auto-Submit: Victor Gomes <victorgomes@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#76122}