Adding support for Incus

[bds-congnguyen]

Hi there!
Incus is the new linux container, the next generation of system container and virtual machine manager, the folk of LXD.

Currently, I didn't see Linstor support Incus as storage driver. so I'd like to ask for this feature supported by Linstor.

Best regards.

[rck]

Just some quick notes from one that briefly looked into LXD support for LINSTOR a very long time ago: Should be doable, but we already have a ton of plugins to maintain and to be honest as long as there is no real market demand (i.e., paying LINBIT customers), I don't think this is going to happen from our side. FLOSS contributions obviously always welcome.