* add client_credentials authentication for keycloak tasks incl. test case
* support client credentials in all keycloak modules
* Add changelog fragment
* fix typos in required list
* Update changelogs/fragments/10231-keycloak-add-client-credentials-authentication.yml
Co-authored-by: Felix Fontein <felix@fontein.de>
* revert keycloak url in test environment
---------
Co-authored-by: Felix Fontein <felix@fontein.de>