Add ceph_infra tag to rolling_update

Add ceph_infra tag to rolling_update

When the upgrade from Ceph 4 to 5 is performed in the OpenStack context,
ceph-ansible triggers the rolling_update playbook, which is supposed to
rollout new Ceph containers.  The ceph-infra role tries to take care
about firewall, ntp config and logrotate; however, TripleO manages them
through tripleo-heat-templates.  This patch just add an additional tag
to skip the ceph-infra role in the OpenStack context.

Closes: https://bugzilla.redhat.com/2090456
Signed-off-by: Francesco Pantano <fpantano@redhat.com>