Only hardening; no behavioral changes.

Bug: v8:11111
Change-Id: I66765b661485334b1b14d9ceaa16a8df355d1898
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3826246Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82429}