Create CentOS 9 Stream disk image
Given our recent momentum on #661 (closed) and #233 (closed), I went ahead with this.
The main issue is that RHEL moved systemd-networkd
out of candidate/test status it had during RHEL 8, so it is no longer well-supported, and is only available in some extra repo elsewhere. We like to use the default network manager in each distro when we can, so it's time to embrace NetworkManager!
Edited by David Johnson