BIOS and UEFI VMs fail rebase from CS8 to CS9

[mcattamoredhat]

edge-8to9-cs9 is failing. BIOS and UEFI VMs fail rebase from CS8 to CS9 after command:

+ sudo ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ConnectTimeout=5 -i key/ostree_key admin@192.168.100.51 'sudo rpm-ostree rebase rhel-edge:centos/9/x86_64/edge'

It has been seen in the virsh console that VMs enter to emergency mode and show the following error message:

[  294.342925] localhost systemd[1]: Finished Dump journal to virtio port.
[  294.353122] localhost systemd[1]: initrd-udevadm-cleanup-db.service: Deactivated successfully.
[  294.353582] localhost systemd[1]: Finished Cleanup udev Database.
[  294.354226] localhost systemd[1]: Finished Setup Virtual Console.
[  294.360027] localhost systemd[1]: Started Emergency Shell.
[  294.360255] localhost systemd[1]: Reached target Emergency Mode.
[  294.360309] localhost systemd[1]: Reached target Switch Root.
[  294.362643] localhost systemd[1]: Starting Switch Root...
[  294.374891] localhost @ystemctl[794]: Failed to switch root: Specified switch root path '/sysroot' does not seem to be an OS tree. os-release file is missing.
[  294.376440] localhost systemd[1]: initrd-switch-root.service: Main process exited, code=exited, status=1/FAILURE
[  294.376846] localhost systemd[1]: initrd-switch-root.service: Failed with result 'exit-code'.
[  294.377214] localhost systemd[1]: Failed to start Switch Root.
[  294.377333] localhost systemd[1]: initrd-switch-root.service: Triggering OnFailure= dependencies.
:/# 

Since the error mentions initrd-switch-root.service this is likely to be related with dracut versions.