Switch to OVS/OVN LTS branches

As discussed in Epoxy PTG[1] switching jobs to run
with latest OVS/OVN LTS branches.
Ubuntu noble and CentOS 9-stream also including these
LTS versions.

[1] https://etherpad.opendev.org/p/oct2024-ptg-neutron

Change-Id: Iecb33628641cd33b6e46d09759e3180cc0bd55e9
3 files changed