Support authentication in Bifrost

* Switch from python-ironic-inspector-client to openstacksdk in
  ironic-inspector-rules. This allows us to use clouds.yaml to provide
  credentials.
* Enable authentication in Bifrost. Passwords are auto-generated by
  Bifrost, and stored files in /root/.config/bifrost/. This change
  depends on a Kolla Ansible patch that ensures that these credentials
  are persisted between recreations of the bifrost container.
* Copy clouds.yaml and (if present) a CA certificate from the Bifrost
  container to the seed host, under the Kayobe Ansible user (stack).
  This allows us to use the credentials to register introspection rules.
* This patch is needed by a Kolla Ansible patch that enables TLS in
  Bifrost, since we need the CA certificate on the host to register
  introspection rules when TLS is enabled.

Depends-On: https://review.opendev.org/c/openstack/kolla-ansible/+/851837
Needed-By: https://review.opendev.org/c/openstack/kolla-ansible/+/851838

Story: 2010206
Task: 45930

Change-Id: I757f1bb72afb01a4f1689bed292f5b71b9048fa0