fix #16690 - stable/prometheus - fails with empty clusterrole ruleset (#16692)

* fix #16690 - stable/prometheus - fails with empty clusterrole ruleset

Signed-off-by: Till Adam <lxmail@web.de>

* bump chart version to fulfill circle ci requirements

Signed-off-by: Till Adam <lxmail@web.de>

stable/prometheus/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: prometheus
-version: 9.4.0
+version: 9.4.1
 appVersion: 2.13.1
 description: Prometheus is a monitoring system and time series database.
 home: https://prometheus.io/

stable/prometheus/templates/alertmanager-clusterrole.yaml

@@ -15,5 +15,7 @@ rules:
     - use
     resourceNames:
     - {{ template "prometheus.alertmanager.fullname" . }}
+{{- else }}
+  []
 {{- end }}
 {{- end }}

stable/prometheus/templates/pushgateway-clusterrole.yaml

@@ -15,5 +15,7 @@ rules:
     - use
     resourceNames:
     - {{ template "prometheus.pushgateway.fullname" . }}
+{{- else }}
+  []
 {{- end }}
 {{- end }}