examples/boto3: add ListObjectsV2Request shape to boto3 sdk extras with AllowUnordered as member

feat: add ListObjectsV2Request shape to boto3 sdk extras with AllowUnordered as member

feat: add list-objects-v2 unordered supports to doc

Signed-off-by: Salar Nosrati-Ershad <snosratiershad@gmail.com>

examples/boto3/README.md

@@ -14,6 +14,11 @@ The standard [AWS CLI](https://docs.aws.amazon.com/cli/latest/) may also be used
 aws --endpoint-url http://localhost:8000 s3api list-objects --bucket=mybucket --allow-unordered
 ```
 
+- Unordered listing (version 2):
+```
+aws --endpoint-url http://localhost:8000 s3api list-objects-v2 --bucket=mybucket --allow-unordered
+```
+
 - Topic creation with endpoint:
 ```
 aws --endpoint-url http://localhost:8000 sns create-topic --name=mytopic --attributes='{"push-endpoint": "amqp://localhost:5672", "amqp-exchange": "ex1", "amqp-ack-level": "broker"}'

examples/boto3/service-2.sdk-extras.json

@@ -36,6 +36,16 @@
                 }
             }
         },
+        "ListObjectsV2Request": {
+            "members": {
+                "AllowUnordered": {
+                    "shape":"AllowUnordered",
+                    "documentation":"<p>Allow the listing results to be returned in unsorted order. This may be faster when listing very large buckets.</p>",
+                    "location":"querystring",
+                    "locationName":"allow-unordered"
+                }
+            }
+        },
         "AllowUnordered":{"type":"boolean"},
         "PutObjectRequest": {
             "members": {