Create new user groups on fa.wikivoyage

* Create "autopatrolled", "flood", "patroller" and "rollbacker" user groups,
able to be added and removed by sysops.
* Allow sysops to add/remove "confirmed users" group.

Bug: 71760
Change-Id: I6e7215be05659abd3afbf87aa2603a4c3f18a211