Remove configuration of advanced-virtualisation repo
Remove configuration of advanced-virtualisation repo

This is a repo only relevant to EOL centos-8. It is replaced by
advancedvirt-common in centos-8-stream and only relevant to nova.

Management of this repo is moved to the os_nova role from the Yoga
release of openstack-ansible.

Change-Id: I66246eeea594af55a6d2f2aff4f5cb33611df1c5

openstack/openstack-ansible-openstack_hosts,openstack/openstack-ansible-openstack_hosts