Replace some manual Keycloak API calls with ansible modules

[devium]

https://docs.ansible.com/ansible/latest/collections/community/general/keycloak_clientscope_module.html#ansible-collections-community-general-keycloak-clientscope-module https://docs.ansible.com/ansible/latest/collections/community/general/keycloak_authentication_module.html#ansible-collections-community-general-keycloak-authentication-module