Optionally create a katello-default-ca with public CA certs from multiple sources
If you have more than 1 katello server, each with their own 'Default CA'. Clients and foreman-proxy need to trust all the possible 'Default CAs' for secure communication.
Otherwise you will get SSL errors like:
Peer does not recognize and trust the CA that issued your certificate
Refs #20021 - Optionally generate CA public cert with other CAs certs included