Move centos stream testing to centos-9-stream
Move centos stream testing to centos-9-stream

In Zed cycle testing runtime, we are targetting the centos 9 stream
- https://governance.openstack.org/tc/reference/runtimes/zed.html

With dropping the python 3.6 support, project started adding python 3.8
as minimum, example nova:
- https://github.com/openstack/nova/blob/56b5aed08c6a3ed81b78dc216f0165ebfe3c3350/setup.cfg#L13

with that, centos 8 stream job is failing 100%
- https://zuul.openstack.org/build/970d029dc96742c3aa0f6932a35e97cf
- https://zuul.openstack.org/builds?job_name=tempest-integrated-compute-centos-8-stream&skip=0

QA is dropping the centos-8-stream testing and support
- https://review.opendev.org/q/topic:drop-c8s-testing

This commit replace tempest-integrated-compute-centos-8-stream job to
tempest-integrated-compute-centos-9-stream.

Depends-On: https://review.opendev.org/c/openstack/tempest/+/839274
Change-Id: I516b9d732ccea6e12904a1612530bce273d06587

mahak/nova,openstack/nova,mahak/nova,openstack/nova,mahak/nova,openstack/nova