Also add AO: ToISODayOfWeek
Spec Text:
https://tc39.es/proposal-temporal/#sec-temporal.calendar.prototype.dayofweek
https://tc39.es/proposal-temporal/#sec-temporal-toisodayofweek

Note- this is only the non-intl version. intl version in
https://tc39.es/proposal-temporal/#sup-temporal.calendar.prototype.dayofweek
will be implemented in later cl.


Bug: v8:11544
Change-Id: I0b3448209741e4aa56cd8170a331d837853bff17
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3531564Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79698}