Deprecate OpenStack-Ansible nspawn repositories
Deprecate OpenStack-Ansible nspawn repositories

Since nspawn support has been removed with [1] we now
start repositories deprecation process.

[1] https://review.opendev.org/c/openstack/openstack-ansible/+/782569

Change-Id: I7e213d2171678c60e1679884445a789ecf3761ad

openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals