https://tc39.es/proposal-intl-extend-timezonename/
https://chromestatus.com/guide/edit/4506375298220032

Bugs: v8:11661

Change-Id: I6d7e1bccf5a26ca02d39dc72d9362134a60ad6b9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2757899Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74809}