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