Cinder-volume: auto-connect block-devices

Hello snapstore team,

I uploaded the first revision of cinder-volume in the snapstore, and got blocked with human review required due to 'allow-installation' constraint (bool) declaration-snap-v2_plugs_installation (cinder-volume, block-devices),

I would like to request the usage of block-devices for cinder-volume snap.

This snap will be the bases of other more specialized snaps for providing third party storage system in cinder-volume, but should still be working as a generic snap for integrated drivers.

Cinder-volume snaps will need access to different devices to provide / use iscsi devices, nvme over tcp, nvme over fc, fiber channels…

Thank you!