Add support for volume scopes
Add support for volume scopes

This is similar to network scopes where a volume can either be `local`
or `global`. A `global` volume is one that exists across the entire
cluster where as a `local` volume exists on a single engine.

Signed-off-by: Brian Goff <dc73d0991b982a8303e713ef531a313af77e242a@gmail.com>

redpanda/cli,redpanda/cli,ashfall/cli,docker/cli,dnephin/cli,thaJeztah/cli,e11137/cli,cpuguy83/cli,Zebrilee/cli,dnephin/cli,allencloud/cli,thaJeztah/cli,cpuguy83/cli,Zebrilee/cli,riyazdf/cli,docker/cli,e11137/cli,riyazdf/cli,ashfall/cli,allencloud/cli