update to keycloak 20
* feat: allow jwt role to be set * chore: update documentation * fix: cr suggestions * fix: lint issues * respect org auto assign and default org ID * add server admin to devenv Co-authored-by: jguer <joao.guerreiro@grafana.com>
* Move auth docker images to parent folder * Add README file for auth parent folder * Add grafana-authnz-team as code owner * Update `devenv` docs