Introduces a CheckSymbol to guard a reference equality for values in an
equality comparison with Symbol feedback.

Bug: v8:7700
Change-Id: Ieb012b292f2d955faf76e485e6636a2d293fa007
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3811500
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82219}