Support for linked clones for VM templates

[acidrop]

This is a a feature request.

In Proxmox GUI, there's an option to create "linked clones" from a base template VM.
Currently LINSTOR proxmox plugin offers only the option for full clones, which works but it is time and space consuming.
LINSTOR itself supports linked clones if combined with DRBD/ZFS or DRBD/ThinLVM storage backends. One can manually snapshot the base VM template by using 'linstor s c' and then restore the snapshot to a new resource by using 'linstor s r rst ...' . Finally attach this resource (vm disk) to a new VM. It would be nice to include this process into the proxmox plugin, if possible.

Thanks