zuul: Put Centos9 Stream job periodic-weekly and experimental

This patch is a followup on 45c0a3884b

As agreed on the Nova weekly meeting [1], we won't put back C9S job to voting
and we'll rather put it on both experimental and periodic-weekly pipelines.
In order to insure we will monitor the status of those runs, we'll check
the status of the job during every Nova meeting happening weekly.

In order to trigger potential race conditions, it was acted to provide an
experimental job for C9S too.

[1] https://meetings.opendev.org/meetings/nova/2022/nova.2022-07-05-16.00.log.html#l-52

Change-Id: I2de4d90202fd7e735026150f79409d51f2d70e0e

.zuul.yaml

@@ -699,11 +699,6 @@
         - barbican-tempest-plugin-simple-crypto:
             irrelevant-files: *nova-base-irrelevant-files
             voting: false
-        - tempest-integrated-compute-centos-9-stream:
-            irrelevant-files: *nova-base-irrelevant-files
-            # NOTE(sbauza): This job is temporarly non-voting until
-            # bug #1979047 is resolved as it holds our CI.
-            voting: false
     gate:
       jobs:
         - nova-live-migration
@@ -729,16 +724,13 @@
             irrelevant-files: *nova-base-irrelevant-files
         - openstacksdk-functional-devstack:
             irrelevant-files: *nova-base-irrelevant-files
-        - tempest-integrated-compute-centos-9-stream:
-            irrelevant-files: *nova-base-irrelevant-files
-            # NOTE(sbauza): This job is temporarly non-voting until
-            # bug #1979047 is resolved as it holds our CI.
-            voting: false
     periodic-weekly:
       jobs:
         # Runs emulation feature functionality test less frequently due
         # to being the initial release and experimental in nature.
         - nova-emulation
+        - tempest-integrated-compute-centos-9-stream:
+            irrelevant-files: *nova-base-irrelevant-files
     experimental:
       jobs:
         - ironic-tempest-bfv:
@@ -771,6 +763,8 @@
         - tempest-centos8-stream-fips:
             irrelevant-files: *nova-base-irrelevant-files
         - nova-emulation
+        - tempest-integrated-compute-centos-9-stream:
+            irrelevant-files: *nova-base-irrelevant-files
     periodic:
       jobs:
         - tempest-centos8-stream-fips: