Add centos-9 jobs for wallaby zuul layout

Adds puppet-neutron-tripleo-centos-9-standalone definition
and into the check zuul layout. This is added as non voting
as puppet openstack will not support c9 on wallaby.

See the topic branch [1] for related reviews and [2] for context.

[1] https://review.opendev.org/q/topic:c9_wallaby_gates
[2] http://lists.openstack.org/pipermail/openstack-discuss/2022-February/027403.html

Depends-On: https://review.opendev.org/c/openstack/puppet-openstack-integration/+/831206
Change-Id: Ifbb08af4939749f58881436731096697357e6e4c

.zuul.yaml

@@ -9,6 +9,7 @@
     check:
       jobs:
         - puppet-neutron-tripleo-standalone
+        - puppet-neutron-tripleo-centos-9-standalone
     gate:
       jobs:
         - puppet-neutron-tripleo-standalone
@@ -18,7 +19,7 @@
     parent: tripleo-puppet-ci-centos-8-standalone
     description: |
       TripleO standalone Job running Neutron specific Tempest tests.
-    vars:
+    vars: &standalone_vars
       consumer_job: true
       build_container_images: false
       remove_tags:
@@ -30,3 +31,13 @@
         use_os_tempest: true
     dependencies:
       - tripleo-puppet-ci-centos-8-content-provider
+
+- job:
+    name: puppet-neutron-tripleo-centos-9-standalone
+    voting: false
+    parent: tripleo-puppet-ci-centos-9-standalone
+    description: |
+      TripleO standalone Job running Neutron specific Tempest tests.
+    vars: *standalone_vars
+    dependencies:
+      - tripleo-puppet-ci-centos-9-content-provider