Adding pipeline and jobs for c9 stream

This patch:
- Defines new pipeline openstack-periodic-integration-main-centos-stream-9
- Defines new job periodic-tripleo-ci-build-containers-centos-9-push-master and
periodic-tripleo-centos-9-master-promote-promoted-components-to-tripleo-ci-testing

Change-Id: Ifa5121b3dad1340825160747a0d37cf6d29c00eb

zuul.d/integration-jobs-cs9-master.yaml

@@ -0,0 +1,14 @@
+---
+- job:
+    name: periodic-tripleo-ci-build-containers-centos-9-push-master
+    parent: periodic-tripleo-ci-build-containers-ubi-8-push
+    nodeset: cloud-centos-9-stream-vexxhost
+    vars:
+      buildcontainers_override_repos: centos9-master
+      containers_base_image: quay.io/centos/centos:stream9-development
+      registry_namespace: tripleomastercentos9
+      promote_source: tripleo-ci-testing
+- job:
+    name: periodic-tripleo-centos-9-master-promote-promoted-components-to-tripleo-ci-testing
+    parent: periodic-tripleo-centos-8-master-promote-promoted-components-to-tripleo-ci-testing
+    nodeset: cloud-centos-9-stream-vexxhost

zuul.d/integration-pipeline-main-centos9.yaml

@@ -0,0 +1,11 @@
+---
+# master integration pipeline
+- project-template:
+    name: integration-pipeline-main-centos9
+    openstack-periodic-integration-main-cs9:
+      jobs:
+        ##### master #####
+        - periodic-tripleo-ci-build-containers-centos-9-push-master:
+            dependencies:
+              - periodic-tripleo-centos-9-master-promote-promoted-components-to-tripleo-ci-testing
+        - periodic-tripleo-centos-9-master-promote-promoted-components-to-tripleo-ci-testing