ceph: Update CentOS packages to Pacific

[bbezak]

Updates the CentOS images to use centos-release-ceph-pacific. This is
in line with Ubuntu which gets Pacific from UCA. Debian remains on
Nautilus.

Nautilus has been explicitly disabled in base, as RDO installing it
anyway.

Change-Id: Ie1e77f9c7d83538c051362a8972745f184c72019
(cherry picked from commit c6cba08)

[bbezak]

I've built it locally, looks fine:

()[manila@test /etc/yum.repos.d]$ rpm -qa | grep -i ceph
python3-ceph-argparse-16.2.6-1.el8s.x86_64
python3-ceph-common-16.2.6-1.el8s.x86_64
centos-release-ceph-nautilus-1.2-2.el8.noarch
centos-release-ceph-pacific-1.0-2.el8.noarch
libcephfs2-16.2.6-1.el8s.x86_64
ceph-common-16.2.6-1.el8s.x86_64
python3-cephfs-16.2.6-1.el8s.x86_64

()[manila@test /etc/yum.repos.d]$ yum repolist
repo id                                                                                                             repo name
appstream                                                                                                           CentOS Stream 8 - AppStream
baseos                                                                                                              CentOS Stream 8 - BaseOS
centos-ceph-pacific                                                                                                 CentOS-8-stream - Ceph Pacific
centos-nfv-openvswitch                                                                                              CentOS-8 - NFV OpenvSwitch
centos-openstack-wallaby                                                                                            CentOS-8 - OpenStack wallaby
centos-opstools                                                                                                     CentOS-8 - OpsTools - collectd
extras                                                                                                              CentOS Stream 8 - Extras
powertools                                                                                                          CentOS Stream 8 - PowerTools

[bbezak]

Manila Wallaby changed how it reaches Ceph (directing messages to mgr instead of mon), And we're using nautilus's ceph_argparse which does not understand it. We would need to bump ceph client

2021-12-10 09:52:24.261 20 ERROR manila.share.manager manila.exception.ShareBackendException: json_command failed - prefix=fs volume ls, argdict={'format': 'json'} - exception message: Bad target type 'mon-mgr'

https://github.com/ceph/ceph/commit/4000d500c0d2c017e7761a5592df1301d7f40538
https://tracker.ceph.com/issues/51039
https://review.opendev.org/c/openstack/manila/+/794275