+++ This bug was initially created as a clone of Bug #1997884 +++

Description of problem:
The Fedora Cloud WG recently changed to offering hybrid boot cloud images. This was done as the start of a longer-term effort to engage with the community and partners to boot Fedora images with UEFI. As part of this effort, we'd like to have the virt stack default to offering UEFI for VMs (with a CSM for BIOS backward compatibility if possible).

It would be appreciated if Cockpit defaulted to creating VMs with UEFI+CSM for "fedora", "unknown linux" and other similar things.

Additional info:
The full discussion about this is in the Fedora Cloud WG meeting logs here: https://meetbot.fedoraproject.org/teams/fedora_cloud_meeting/fedora_cloud_meeting.2021-08-19-14.59.log.html