Kolla ansible switched its database backup support to mariabackup from
xtrabackup due to incompatibilities. See
https://bugs.launchpad.net/kolla/+bug/1843043 for details.
Change-Id: Ib95771f09fd6d5e71a2af471de47f811e1cab88b
Related-Bug: #1843043
Story: 2006952
Task: 37634