Add stable/2024.1 jobs on master gate

As 2024.1 is released, we should add its job on master
gate to keep branchless tempest plugins compatible to stable branch.

Also, fixing a few of the stable/2023.2 jobs to override-checkout 2023.2.

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

Change-Id: I13d977eba7c324df3036e0b0dc31a3943bd8549e
2 files changed