The "ha" API flag is now enabled for the OVN routers. Because of the
current implementation, this flag must be always "True". When a new
router is created, this flag is always set. If an OVN router is
explicitly created or updated with "--no-ha" (ha=False), the server
will raise an InvalidInput exception.
Depends-On: https://review.opendev.org/c/openstack/neutron-tempest-plugin/+/911081
Closes-Bug: #2020823
Change-Id: I60ff33680dd5397a226a9051d51bfb0701f862b5