Two recent changes in CI infra have affected
whitebox_neutron_tempest_plugin jobs:
1) After updating of pep8 jobs to ubuntu-noble/python3.12, an error is
reported and this patch fixes it.
2) Tests using advanced images had issues to boot rocky 9.3 VM instances
and due to that, this patch updates it to rocky 9.5.
As a consequence of this change, virt-customize command has been
updated to:
* install tcpdump
* enable dhcp for NetworkManager
And some tests have been adapted to rocky 9.5 characteristics.
Change-Id: I489ecaf1765570e52b1f2d2676f13a0edc5f6fc4
435766502a