Update irictl-volume to support volumesnapshot operations

[kasabe28]

Proposed Changes

• Update irictl-volume to support volumesnapshot operations - Get, Delete, Create

Fixes #1341

[Rohit-0505]

Since VolumeSnapshot is a new API type, it might be better to create a separate irictl-volumesnapshot implementation instead of combining it with irictl-volume.
@afritzler, @lukasfrank, and @balpert89 - could you please share your thoughts on this?

[balpert89]

I am in favor of the current implementation. The reason for this is how the API types are being handled. You have poollet and broker for the same types as the irictl-xxx implementation. Since Volume and VolumeSnapshot are managed by the same runtime, my suggestion is to not introduce a new dedicated irictl-volumesnapshot cmd.