[aws-cloudwatch-metrics] fix: support prometheus scraping

Fixes #1098

Author: tdharris

stable/aws-cloudwatch-metrics/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v1
 name: aws-cloudwatch-metrics
 description: A Helm chart to deploy aws-cloudwatch-metrics project
-version: 0.0.11
+version: 0.0.12
 appVersion: "1.300032.2b361"
 home: https://github.com/aws/eks-charts
 icon: https://raw.githubusercontent.com/aws/eks-charts/master/docs/logo/aws.png

stable/aws-cloudwatch-metrics/templates/clusterrole.yaml

@@ -22,3 +22,5 @@ rules:
   resources: ["configmaps"]
   resourceNames: ["cwagent-clusterleader"]
   verbs: ["get","update"]
+- nonResourceURLs: ["/metrics"]
+  verbs: ["get"]