zuul: Temporarly put Centos9 Stream job non-voting

Due to the bug below, all the nova patches are failing. I accordingly
propose to make the job non-voting as it would allow our gate to ressurect.

Of course, this is a transient solution and we need a proper fix for the
job in order to have Centos 9 Stream support back in place ASAP.

When the job is back OK, please make it voting again by reverting this patch.

Change-Id: I5c3fff65fd6d9e4f3632d1ec62ae3f1f9cfbe626
Related-Bug: #1979047

.zuul.yaml

@@ -701,6 +701,9 @@
             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
@@ -728,6 +731,9 @@
             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