* Remove POST config for Grafana Alertmanager * Delete auth + test for removed path * Alerting: Remove check for `alertingApiServer` toggle in UI (#103805) * Remove check for alertingApiServer in UI * Update tests to no longer care about alertingApiServer * Add contact points handlers now that we use alertingApiServer all the time * Fix test broken from removing camelCase for UIDs --------- Co-authored-by: Tom Ratcliffe <tom.ratcliffe@grafana.com>