feat(client-cloudwatch): Add v2 smoke tests and smithy smokeTests trait for SDK testing.

Author: awstools

codegen/sdk-codegen/aws-models/cloudwatch.json

@@ -2594,7 +2594,7 @@
           "sdkId": "CloudWatch",
           "arnNamespace": "monitoring",
           "cloudFormationName": "CloudWatch",
-          "cloudTrailEventSource": "cloudwatch.amazonaws.com",
+          "cloudTrailEventSource": "monitoring.amazonaws.com",
           "docId": "monitoring-2010-08-01",
           "endpointPrefix": "monitoring"
         },
@@ -4360,7 +4360,22 @@
         "smithy.api#paginated": {
           "inputToken": "NextToken",
           "outputToken": "NextToken"
-        }
+        },
+        "smithy.test#smokeTests": [
+          {
+            "id": "ListMetricsSuccess",
+            "params": {
+              "Namespace": "AWS/EC2"
+            },
+            "vendorParams": {
+              "region": "us-west-2"
+            },
+            "vendorParamsShape": "aws.test#AwsVendorParams",
+            "expect": {
+              "success": {}
+            }
+          }
+        ]
       }
     },
     "com.amazonaws.cloudwatch#ListMetricsInput": {