feat: set docker CA if Pulp TLS is enabled

Author: jackhodgkiss

etc/kayobe/docker.yml

@@ -30,7 +30,7 @@ docker_registry: "{{ stackhpc_docker_registry }}"
 docker_registry_insecure: "{{ 'https' not in stackhpc_repo_mirror_url }}"
 
 # CA of docker registry
-#docker_registry_ca:
+docker_registry_ca: "{{ kayobe_env_config_path ~ '/openbao/OS-TLS-INT.crt' if pulp_enable_tls | bool else '' }}"
 
 # List of Docker registry mirrors.
 #docker_registry_mirrors: