on dropping ubuntu focal support for squid

there was a consensus to drop support for ubuntu focal and centos stream 8 with the squid release, and i'd love to remove those distros from the shaman build matrix for squid and main branches asap however, i see that quincy never supported ubuntu jammy, so our quincy upgrade tests still have to run against focal. that means we'd still have to build focal packages for squid would it be possible to start building jammy packages for quincy to allow those upgrade tests to run jammy instead? this isn't an issue on the centos side because we've been building centos 9 packages for quincy even though it's not listed in https://docs.ceph.com/en/latest/start/os-recommendations/#platforms