need to update `clickhouse-keeper` alert rules for actual prometheus metircs

Are these metric names even valid for clickhouse-keeper anymore? I don't see the `/metrics` endpoint for keeper exposing them unless I'm missing something? https://github.com/Altinity/clickhouse-operator/blob/b0dc549109edd58a47005a4118160de9c23bb606/deploy/prometheus/prometheus-alert-rules-chkeeper.yaml#L64