CentOS Storage SIG rpms have a recommended install
section that installs podman - let's stop doing that.

Ceph is also suffering from the enormous open files
ulimit that EL9 defaults to - let's set a default
in docker engine for now.

Change-Id: I41f39f520dfecec307ad3b86e1e0363570198e42

Added c9s jobs are non voting, as agreed on PTG to focus on Rocky Linux 9.
Since both CS9 and RL9 have higher default fd limit (1073741816 vs
1048576 in CS8) - lowering that for:
* RMQ - because Erlang allocates memory based on this (see [1], [2], [3]).
* MariaDB - because Galera cluster bootstrap failed

Changed openvswitch_db healthcheck, because for unknown reason
the usual check (using lsof on /run/openvswitch/db.sock) is hanging
on "Bad file descriptor" (even with privileged: true).

[1]: https://github.com/docker-library/rabbitmq/issues/545
[2]: https://github.com/rabbitmq/cluster-operator/issues/959#issuecomment-1043280324
[3]: https://github.com/systemd/systemd/commit/a8b627aaed409a15260c25988970c795bf963812

Depends-On: https://review.opendev.org/c/openstack/tenks/+/856296
Depends-On: https://review.opendev.org/c/openstack/kolla-ansible/+/856328
Depends-On: https://review.opendev.org/c/openstack/kolla-ansible/+/856443
Needed-By: https://review.opendev.org/c/openstack/kolla/+/836664


Co-Authored-By: Michał Nasiadka <mnasiadka@gmail.com>
Change-Id: I3f7b480519aea38c3927bee7fb2c23eea178554d

Change-Id: I81a4f8f8b8faa7559740531bb16d8aec7fc23f9b