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

Bug: v8:10488
Change-Id: Ifa9443609fa30fa2d8f9fb9ed00ce9353fa9aa49
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2189910Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67718}