Volumes (pod-shared and cinder-conversion) should be created
regardless of ceph backend existence but those are created
conditionally.
This bug has been existing but never revealed because conditional
check for ceph backend was wrong before. After this change
https://review.opendev.org/c/openstack/openstack-helm/+/852809,
started happening.
Change-Id: Ifc90e40bc201245d3d9e2b472573948ff64e0c61