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

Author: awstools

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

@@ -1442,17 +1442,6 @@
               "expect": {
                 "error": "Invalid Configuration: Missing Region"
               }
-            },
-            {
-              "documentation": "Partition doesn't support DualStack",
-              "expect": {
-                "error": "DualStack is enabled but this partition does not support DualStack"
-              },
-              "params": {
-                "Region": "us-isob-east-1",
-                "UseFIPS": false,
-                "UseDualStack": true
-              }
             }
           ],
           "version": "1.0"
@@ -6123,7 +6112,20 @@
           "outputToken": "Marker",
           "items": "DBEngineVersions",
           "pageSize": "MaxRecords"
-        }
+        },
+        "smithy.test#smokeTests": [
+          {
+            "id": "DescribeDBEngineVersionsSuccess",
+            "params": {},
+            "vendorParams": {
+              "region": "us-west-2"
+            },
+            "vendorParamsShape": "aws.test#AwsVendorParams",
+            "expect": {
+              "success": {}
+            }
+          }
+        ]
       }
     },
     "com.amazonaws.neptune#DescribeDBEngineVersionsMessage": {
@@ -6210,6 +6212,21 @@
           "pageSize": "MaxRecords"
         },
         "smithy.api#suppress": ["WaitableTraitInvalidErrorType"],
+        "smithy.test#smokeTests": [
+          {
+            "id": "DescribeDBInstancesFailure",
+            "params": {
+              "DBInstanceIdentifier": "fake-id"
+            },
+            "vendorParams": {
+              "region": "us-west-2"
+            },
+            "vendorParamsShape": "aws.test#AwsVendorParams",
+            "expect": {
+              "failure": {}
+            }
+          }
+        ],
         "smithy.waiters#waitable": {
           "DBInstanceAvailable": {
             "acceptors": [