Replace Centos stream 8 by stream 9 (backport #7579)

[mergify]

In test scenarios

---

This is an automatic backport of pull request #7579 done by Mergify.

[mergify]

Cherry-pick of 4a981a2 has failed:

On branch mergify/bp/stable-7.0/pr-7579
Your branch is up to date with 'origin/stable-7.0'.

You are currently cherry-picking commit 4a981a201.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   tests/functional/add-mdss/container/vagrant_variables.yml
	modified:   tests/functional/add-mdss/vagrant_variables.yml
	modified:   tests/functional/add-mgrs/container/vagrant_variables.yml
	modified:   tests/functional/add-mgrs/vagrant_variables.yml
	modified:   tests/functional/add-osds/container/vagrant_variables.yml
	modified:   tests/functional/add-osds/vagrant_variables.yml
	modified:   tests/functional/add-rbdmirrors/container/vagrant_variables.yml
	modified:   tests/functional/add-rbdmirrors/vagrant_variables.yml
	modified:   tests/functional/add-rgws/container/vagrant_variables.yml
	modified:   tests/functional/add-rgws/vagrant_variables.yml
	modified:   tests/functional/all-in-one/container/vagrant_variables.yml
	modified:   tests/functional/all-in-one/vagrant_variables.yml
	modified:   tests/functional/all_daemons/container/vagrant_variables.yml
	modified:   tests/functional/all_daemons/vagrant_variables.yml
	modified:   tests/functional/all_daemons_ipv6/container/vagrant_variables.yml
	modified:   tests/functional/all_daemons_ipv6/vagrant_variables.yml
	modified:   tests/functional/cephadm/vagrant_variables.yml
	modified:   tests/functional/collocation/container/vagrant_variables.yml
	modified:   tests/functional/collocation/vagrant_variables.yml
	modified:   tests/functional/docker2podman/vagrant_variables.yml
	modified:   tests/functional/external_clients/container/vagrant_variables.yml
	modified:   tests/functional/external_clients/vagrant_variables.yml
	modified:   tests/functional/infra_lv_create/vagrant_variables.yml
	modified:   tests/functional/lvm-auto-discovery/vagrant_variables.yml
	modified:   tests/functional/lvm-batch/vagrant_variables.yml
	modified:   tests/functional/lvm-osds/vagrant_variables.yml
	modified:   tests/functional/migrate_ceph_disk_to_ceph_volume/vagrant_variables.yml
	modified:   tests/functional/rbdmirror/secondary/vagrant_variables.yml
	modified:   tests/functional/rbdmirror/vagrant_variables.yml
	modified:   tests/functional/shrink_mds/container/vagrant_variables.yml
	modified:   tests/functional/shrink_mds/vagrant_variables.yml
	modified:   tests/functional/shrink_mgr/container/vagrant_variables.yml
	modified:   tests/functional/shrink_mgr/vagrant_variables.yml
	modified:   tests/functional/shrink_mon/container/vagrant_variables.yml
	modified:   tests/functional/shrink_mon/vagrant_variables.yml
	modified:   tests/functional/shrink_osd/container/vagrant_variables.yml
	modified:   tests/functional/shrink_osd/vagrant_variables.yml
	modified:   tests/functional/shrink_rbdmirror/container/vagrant_variables.yml
	modified:   tests/functional/shrink_rbdmirror/vagrant_variables.yml
	modified:   tests/functional/shrink_rgw/container/vagrant_variables.yml
	modified:   tests/functional/shrink_rgw/vagrant_variables.yml
	modified:   tests/functional/subset_update/container/vagrant_variables.yml
	modified:   tests/functional/subset_update/vagrant_variables.yml

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   tox-update.ini

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[clwluvw]

jenkins retest this please