Update external timezone information to IANA TZDB 2024a
Summary:
Update the list of timezones by pulling from CLDR upstream (revision `9d96f34` from 2024-02-08) located here:
https://github.com/unicode-org/cldr/blob/main/common/supplemental/windowsZones.xml
Permalink:
https://github.com/unicode-org/cldr/blob/9d96f340ab145003b3e6d12d95ffb16f19a8a529/common/supplemental/windowsZones.xml
Closes T15876
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.
* Run the `diff` command against
Reviewers: O1 Blessed Committers, valerio.bozzolan
Reviewed By: O1 Blessed Committers, valerio.bozzolan
Subscribers: revi, tobiaswiese, valerio.bozzolan, Matthew, Cigaryno
Maniphest Tasks: T15876
Differential Revision: https://we.phorge.it/D25722