fix(grafana): add ingress-nginx dashboard & update datasources

bootstrap/templates/addons/grafana/app/helmrelease.yaml.j2

@@ -42,6 +42,7 @@ spec:
       analytics:
         check_for_updates: false
         check_for_plugin_updates: false
+        reporting_enabled: false
     dashboardProviders:
       dashboardproviders.yaml:
         apiVersion: 1
@@ -62,6 +63,9 @@ spec:
             type: prometheus
             access: proxy
             url: http://kube-prometheus-stack-prometheus.monitoring.svc.cluster.local:9090
+            jsonData:
+              prometheusType: Prometheus
+            uid: prometheus
             isDefault: true
     dashboards:
       default:
@@ -74,6 +78,12 @@ spec:
         flux-control-plane:
           url: https://raw.githubusercontent.com/fluxcd/flux2/main/manifests/monitoring/monitoring-config/dashboards/control-plane.json
           datasource: Prometheus
+        ingress-nginx:
+          url: https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/grafana/dashboards/nginx.json
+          datasource: Prometheus
+        ingress-nginx-request-handling-performance:
+          url: https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/grafana/dashboards/request-handling-performance.json
+          datasource: Prometheus
     sidecar:
       dashboards:
         enabled: true