The version that we were capping to is no longer compatible with latest
upper-constraints.txt, so let us free float again.

The resulting linting errors are included for now to unblock the gate,
these will still need to be discussed or fixed later.

NOTE(kevko): Temporarily disabling horizon deployment, as it's not
possible to unblock gates without it

Co-Authored-By: Michal Arbet <michal.arbet@ultimum.io>
Change-Id: Ib7f72b2663199ef80844a412bc436c6ef09322cc

Currently we don't gather mon/mgr logs, which are essential for
debugging Ceph integration issues - this patch improves that.

Change-Id: I4ec34511b022707d0069d7a07f2f92b34acf0085

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

Change-Id: If6c7bcb6a2b5017797caeb34f89f5341c54be6dc

Change-Id: If9b40079d42cdabfd14d27603357dd0aa027a49b

Change-Id: I9c736a586a757b49170977c7f9cf2c4890557a33

This reverts commit a967b9dd.

Reason for revert: Check if it's still the case.

Change-Id: Ib5496d6bc2ddfe1fedacc4f9c859ac56fc69726e

Background in [1].
Ubuntu uses pre 15.2.11 client and new 15.2.11 installs default that to false,
therefore not allowing Ubuntu clients to connect.

[1]: https://docs.ceph.com/en/latest/security/CVE-2021-20288/

Change-Id: Ic251b447026262eab4b406b8432cc009ca97ae82

Change-Id: I81a4f8f8b8faa7559740531bb16d8aec7fc23f9b