Check the function for TF code before finalizing a maglev compilation,
so that we don't accidentally overwrite the higher tier.

Bug: v8:7700
Change-Id: I20eb4e25f3bf2710b6e65f9d866cad143e77943d
Fixed: chromium:1359114
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3870464Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82929}