See
https://clang.llvm.org/extra/clang-tidy/checks/modernize-use-override.html
for more on this warning.

Bug: v8:10488
Change-Id: I791966d7971baaa60ec9ac1a765f6fc7529ccac7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2219408Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68056}