fix: allow the instances to send metrics (#3067)

fix(cloudwatch): allow the instances to send metrics

This is needed in order to be able to send metrics around the disk and memory. Those were getting a 403 until this update was made.

Author: rgoomar

Diff for: modules/setup-iam-permissions/policies/boundary.json

@@ -13,7 +13,8 @@
         "resource-groups:*",
         "ssm:*",
         "ssmmessages:*",
-        "ec2messages:*"
+        "ec2messages:*",
+        "cloudwatch:*"
       ],
       "Resource": "*"
     },