fix(grafana): use named pvc so it's reused

templated pvc as using a different name al the time. this caused left
over pvc that were unused. name set so they can be reused

!1

templates/Grafana-Grafana.yaml

@@ -141,8 +141,13 @@ spec:
                 name: provisioning-config
             {{ end }}
             - name: grafana-storage
-              ephemeral:
-                volumeClaimTemplate:
+              persistentVolumeClaim:
+                claimName: grafana-pvc
+          serviceAccountName: grafana
+          nodeSelector:
+            kubernetes.io/os: linux
+
+  persistentVolumeClaim:
     metadata:
       annotations:
         pv.beta.kubernetes.io/gid: "65534"
@@ -150,14 +155,9 @@ spec:
         app.kubernetes.io/name: grafana
         app.kubernetes.io/component: graphing
         app.kubernetes.io/part-of: {{ $.Chart.Name }}
-                      app.kubernetes.io/version: {{ $.Chart.Version }}
-                      app.kubernetes.io/managed-by: {{ $.Release.Service }}
     spec:
       accessModes:
         - "ReadWriteMany"
       resources:
         requests:
           storage: "5Gi"
-          serviceAccountName: grafana
-          nodeSelector:
-            kubernetes.io/os: linux