util: Add util to fetch encryption type from vol options
util: Add util to fetch encryption type from vol options

Fetch encryption type from vol options. Make fallback type
configurable to support RBD (default block) and Ceph FS (default file)

Signed-off-by: Marcel Lauhoff <71ffe8e889bf8a669a25bf46f8e88e7fab585e83@suse.com>

ceph/ceph-csi,ceph/ceph-csi,ceph/ceph-csi,ceph/ceph-csi