fix: reducing prometheus retention period to 14d

Author: lorenzocorallo

modules/monitoring/values/grafana.yaml.tftpl

@@ -8,7 +8,6 @@ defaultRules:
     kubeSchedulerAlerting: false
 
 grafana:
-  adminPassword: ${grafana_admin_password}
   persistence:
     enabled: true
     type: pvc
@@ -19,7 +18,7 @@ grafana:
 
 prometheus:
   prometheusSpec:
-    retention: 30d
+    retention: 14d
     storageSpec:
       volumeClaimTemplate:
         spec: