feat(vm2): add initial support for `cdrom`
This is a breaking change comparing to v1 - switching the cdrom schema from a nested block to a nested attribute map.
Improvements comparing to v1:
- support for `ide`, `sata`, `scsi` interfaces
- support for multiple cdroms
Signed-off-by: Pavel Boldyrev <627562+bpg@users.noreply.github.com>
