The Cinder conversion directory option is incorrect here

• name: cinder-conversion
  mountPath: /var/lib/cinder/conversion
  readOnly: true << - it should be false or conditions are expected.

Ref https://docs.redhat.com/en/documentation/red_hat_openstack_services_on_openshift/18.0/html/configuring_persistent_storage/assembly_cinder-configuring-the-block-storage-service_block-storage#proc_cinder-configure-nfs-conversion-directory_block-storage