fix(grafana): dont use operator readiness prob

operator defines endpoint :3000/api/health, which fails with invalid argument

!1

templates/Grafana-Grafana.yaml

@@ -71,6 +71,14 @@ spec:
                 name: grafana-http
             readinessProbe:
               failureThreshold: 3
+              httpGet:
+                path: /login
+                port: 3000
+                scheme: HTTP
+              initialDelaySeconds: 30
+              periodSeconds: 10
+              successThreshold: 1
+              timeoutSeconds: 3
             resources:
               limits:
                 cpu: 2000m