Pin systemd to 252-15 for CentOS Stream 9

Newest versions break libvirtd
For more info check https://bugs.launchpad.net/neutron/+bug/2029335

Disabling upgrade job until we fix CS9 in all stable branches

Change-Id: If5da0b1b81e17ad0dd6dc1ac62442a84510e35ce

playbooks/roles/bifrost-create-vm-nodes/tasks/main.yml

@@ -23,6 +23,18 @@
     - ansible_distribution == "CentOS"
     - ansible_distribution_version|int >= 9
 
+# NOTE(rpittau): systemd-252-16.el9 breaks CS9
+# see https://bugs.launchpad.net/neutron/+bug/2029335
+- name: "Pin systemd to a non-broken version in CentOS Stream 9"
+  dnf:
+    allow_downgrade: true
+    allowerasing: true
+    name: systemd-252-15.el9
+    state: present
+  when:
+    - ansible_distribution == "CentOS"
+    - ansible_distribution_version|int >= 9
+
 - name: "Load distribution defaults"
   include_vars: "{{ item }}"
   with_first_found:

zuul.d/project.yaml

@@ -15,7 +15,9 @@
         - bifrost-integration-redfish-vmedia-uefi-ubuntu-jammy
         - bifrost-integration-redfish-vmedia-uefi-centos-9
         - bifrost-upgrade-ubuntu-jammy
-        - bifrost-upgrade-keystone-centos9
+        # NOTE(rpittau): disabled until we fix CS9 jobs in
+        # stable branches
+        #- bifrost-upgrade-keystone-centos9
         # Non-voting jobs
         - bifrost-integration-tinyipa-keystone-ubuntu-focal:
             voting: false
@@ -65,7 +67,9 @@
         - bifrost-integration-redfish-vmedia-uefi-ubuntu-jammy
         - bifrost-integration-redfish-vmedia-uefi-centos-9
         - bifrost-upgrade-ubuntu-jammy
-        - bifrost-upgrade-keystone-centos9
+        # NOTE(rpittau): disabled until we fix CS9 jobs in
+        # stable branches
+        #- bifrost-upgrade-keystone-centos9
     experimental:
       jobs:
         - bifrost-benchmark-ironic