Refactoring the code dealing with TimeZone Canonicalization.
Change CanonicalizeTimeZoneName from return MaybeHandle<String> to Handle<String>
Move TimeZoneId from JSDateTimeFormat to Intl and return Handle<String> instead of Handle<Object>


Bug: v8:13112
Change-Id: I678b0e0d407e5e4e9dd8b7120c0e99e7e2d9c5ea
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3833435Reviewed-by: Shu-yu Guo <syg@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82505}