R1:6a30dc039ea5

Update external timezone information

Summary:
Update the list of timezones from 2016 by pulling from CLDR upstream (revision `57c1f4c` from 2024-01-11) located at https://github.com/unicode-org/cldr/blob/main/common/supplemental/windowsZones.xml

Closes T15727

Test Plan:
* As an admin, go to http://phorge.localhost/config/edit/phabricator.timezone/ and change the default value.
* As a user, go to http://phorge.localhost/settings/panel/datetime/ and change the value in the `Timezone` dropdown.

Reviewers…