Centos 9 jobs for validations common

Recent move to centos9 nodes has disabled the jobs we rely on.
By moving our jobs to centos9 we can keep our coverage.

The reqcheck job no longer pulls python3-virtualenv package
as it was removed from centos9 stream.

The molecule jobs have been kept on centos-8.

Signed-off-by: Jiri Podivin <jpodivin@redhat.com>
Change-Id: I36a07afc6dc76d47db7b8d4c3538b74bd5a1a48e

.zuul.yaml

@@ -19,7 +19,7 @@
 
 - job:
     name: validations-common-reqcheck
-    nodeset: centos-8-stream
+    nodeset: centos-9-stream
     parent: base
     run: playbooks/reqcheck.yaml
     timeout: 1600
@@ -30,7 +30,7 @@
       - ^requirements.txt$
 - job:
     name: validations-common-coverchange
-    nodeset: centos-8-stream
+    nodeset: centos-9-stream
     parent: base
     run: playbooks/coverchange.yaml
     timeout: 1600
@@ -56,8 +56,8 @@
     voting: true
 
 - job:
-    name: tripleo-ci-centos-8-standalone-validation-common
-    parent: tripleo-ci-centos-8-standalone
+    name: tripleo-ci-centos-9-standalone-validation-common
+    parent: tripleo-ci-centos-9-standalone
     vars:
       featureset: '052'
       validate_services: true
@@ -77,7 +77,7 @@
         - openstack-tox-py36
         - openstack-tox-py39
         - validations-common-functional
-        - tripleo-ci-centos-8-standalone-validation-common:
+        - tripleo-ci-centos-9-standalone-validation-common:
             vars: &consumer_vars
               build_container_images: true
             dependencies:
@@ -95,7 +95,7 @@
         - openstack-tox-py36
         - openstack-tox-py39
         - validations-common-functional
-        - tripleo-ci-centos-8-standalone-validation-common:
+        - tripleo-ci-centos-9-standalone-validation-common:
             vars: *consumer_vars
             dependencies:
               - openstack-tox-linters

playbooks/reqcheck.yaml

@@ -10,8 +10,7 @@
         cmd: |
           set -e
           # Need to inherit system-site-packages for python-yum
-          sudo dnf install -y python3-virtualenv
-          virtualenv --system-site-packages {{ ansible_user_dir }}/.venv
+          python3 -m venv --system-site-packages {{ ansible_user_dir }}/.venv
           source {{ ansible_user_dir }}/.venv/bin/activate
           git clone https://github.com/softwarefactory-project/rdopkg.git
           cd rdopkg