Add stable/2023.1 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 EM stable/xena|wallaby job

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

Change-Id: I80213eb072281ec0a71fa068f9d8f25d0feffe27
1 file changed