This uses ssh signed certificates so there is no longer the need to distribute the nova public key from each compute host to all other compute hosts. The legacy scripts and authorized key files are removed as a migration step. Depends-On: https://review.opendev.org/c/openstack/openstack-ansible/+/825292 Change-Id: I3456bdf7bed66a2675b8a410d4cf6b2174598a22