Update stable jobs on master gate

As 2023.1 is released, we should add its job on master
gate to keep branchless tempest plugins compatible
to stable branch.

Also, removing the stable/xena job as that is in EM
state.
- https://review.opendev.org/c/openstack/releases/+/881254

Ref: Tempest plugins guide for stable branch testing:
- https://docs.openstack.org/tempest/latest/stable_branch_testing_policy.html

Change-Id: I39b5296ee68544a43182dcb346a040856d062aca
1 file changed