ceph: use ceph-volume v2 report format for Pacific
ceph: use ceph-volume v2 report format for Pacific

This fixes cases where raw provisioning mode still cannot be used for
Rook v1.6 and Ceph Pacific clusters where json.Unmarshal fails to read
the ceph-volume output after OSD provisioning.

Signed-off-by: Blaine Gardner <135b86f2968bdbcc730c10d8ababd343bb675986@redhat.com>

rook/rook,rook/nfs,rook/rook,rook/nfs,rook/rook,rook/nfs,rook/rook,rook/rook