We need to make sure that a node doesn't think it's still allocated in a
register (and doesn't need spilling) when it is freed to make space for
another allocation.

Bug: v8:7700
Change-Id: I6e35cd467bb7f17bb20dc6f4ab0a1df9efe78ffa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3582220
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79926}