Add management command to dump auth config data to a file

[bmclaughlin]

Gateway JIRA issue: https://issues.redhat.com/browse/AAP-19981
No-Issue

Example output from management command from Keycloak environment:

# cat auth_config.json 
[
    {
        "type": "galaxy.authentication.authenticator_plugins.keycloak",
        "enabled": true,
        "configuration": {
            "ACCESS_TOKEN_URL": "http://keycloak:8080/auth/realms/aap/protocol/openid-connect/token/",
            "AUTHORIZATION_URL": "http://localhost:8080/auth/realms/aap/protocol/openid-connect/auth/",
            "KEY": "automation-hub",
            "PUBLIC_KEY": "<really_long_public_key_was_here>",
            "SECRET": "REALLYWELLKEPTSECRET"
        }
    },
    {
        "type": "galaxy.authentication.authenticator_plugins.ldap",
        "enabled": false,
        "configuration": {
            "SERVER_URI": null,
            "BIND_DN": null,
            "BIND_PASSWORD": null,
            "USER_DN_TEMPLATE": null,
            "USER_SEARCH": null,
            "USER_SEARCH_BASE_DN": null,
            "USER_SEARCH_SCOPE": null,
            "USER_SEARCH_FILTER": null,
            "GROUP_SEARCH": null,
            "GROUP_SEARCH_BASE_DN": null,
            "GROUP_SEARCH_SCOPE": null,
            "GROUP_SEARCH_FILTER": null,
            "GROUP_TYPE": null,
            "GROUP_TYPE_PARAMS": null,
            "USER_ATTR_MAP": null
        }
    }

Example output from management command from LDAP environment:

# cat auth_config.json 
[
    {
        "type": "galaxy.authentication.authenticator_plugins.keycloak",
        "enabled": false,
        "configuration": {
            "ACCESS_TOKEN_URL": null,
            "AUTHORIZATION_URL": null,
            "KEY": null,
            "PUBLIC_KEY": null,
            "SECRET": null
        }
    },
    {
        "type": "galaxy.authentication.authenticator_plugins.ldap",
        "enabled": false,
        "configuration": {
            "SERVER_URI": "ldap://ldap:10389",
            "BIND_DN": "cn=admin,dc=planetexpress,dc=com",
            "BIND_PASSWORD": "GoodNewsEveryone",
            "USER_DN_TEMPLATE": null,
            "USER_SEARCH_BASE_DN": "ou=people,dc=planetexpress,dc=com",
            "USER_SEARCH_SCOPE": "SUBTREE",
            "USER_SEARCH_FILTER": "(uid=%(user)s)",
            "GROUP_SEARCH_BASE_DN": "ou=people,dc=planetexpress,dc=com",
            "GROUP_SEARCH_SCOPE": "SUBTREE",
            "GROUP_SEARCH_FILTER": "(objectClass=Group)",
            "GROUP_TYPE_PARAMS": null,
            "USER_ATTR_MAP": {
                "email": "mail",
                "last_name": "sn",
                "first_name": "givenName"
            },
            "CONNECTION_OPTIONS": {},
            "START_TLS": null,
            "USER_SEARCH": [
                "ou=people,dc=planetexpress,dc=com",
                "SUBTREE",
                "(uid=%(user)s)"
            ],
            "GROUP_SEARCH": [
                "ou=people,dc=planetexpress,dc=com",
                "SUBTREE",
                "(objectClass=Group)"
            ],
            "GROUP_TYPE": "GroupOfNamesType"
        }
    }