Add F44 compose images

Fedora releng branched Fedora 44 from rawhide last week [1] and quay.io/fedora/fedora:44 [2] is available.
The compose repos are also available [3].
Therefore, we can start building fedora-bootc-44-compose images.

[1] https://fedorapeople.org/groups/schedule/f-44/f-44-key-tasks.html
[2] https://quay.io/repository/fedora/fedora?tab=tags&tag=latest
[3] https://kojipkgs.fedoraproject.org/compose/branched/