Update helm release and add required files

Signed-off-by: Michel Hollands <michel.hollands@gmail.com>

.github/configs/cr.yaml

@@ -0,0 +1,3 @@
+owner: grafana
+git-repo: helm-charts
+skip-existing: true

.github/configs/ct.yaml

@@ -0,0 +1,15 @@
+## Reference: https://github.com/helm/chart-testing/blob/master/doc/ct_lint-and-install.md
+remote: origin
+target-branch: main
+chart-dirs:
+- charts
+chart-repos:
+  - grafana=https://grafana.github.io/helm-charts
+  - minio=https://charts.min.io
+validate-chart-schema: true
+validate-maintainers: true
+validate-yaml: true
+exclude-deprecated: true
+excluded-charts: []
+namespace: meta-monitoring # Need to set the namespace because we create the secret there
+release-label: app.kubernetes.io/instance