### Is there an existing issue for this?

- [X] I have searched the existing issues

### Feature description

SNS allows for the publishing of messages to an SMS destination with a phone number. Those messages are logged and stored in the `SnsStore`, but there is no way to retrieve them for verification. The request here is to expose a new endpoint which returns SMS messages from the store, similar to the one made available to retrieve email messages sent via SES.

### 🧑‍💻 Implementation

The `SNSServicePlatformEndpointMessagesApiResource` class makes endpoints available for accessing platform endpoint messages sent via SNS. A similar resource class could be implemented to provide new endpoints for accessing SMS messages.

Given that interaction platform endpoint messages is exposed at the path `/_aws/sns/platform-endpoint-messages`, SMS message interaction would presumably be exposed at `/_aws/sns/sms-messages`. A `GET` endpoint could accept an optional `phoneNumber` query parameter to filter messages based on the destination phone number.

```python
class SNSServiceSMSMessagesApiResource:
  @route(sns_constants.SMS_MSGS_ENDPOINT, methods=["GET"])
    def on_get(self, request: Request):
      account_id = #...
      region = #...
      filter_phone_number = request.args.get("phoneNumber")
      # get store; conditionally filter messages based on filter_phone_number
```

### Anything else?

_No response_
"logs:PutLogEvents",
                        "logs:PutMetricFilter",
                        "logs:PutRetentionPolicy",
                    ],
                    "Resource": ["*"],
                }
            ],
        }
        role_response = create_role(
            RoleName=role_name, AssumeRolePolicyDocument=json.dumps(trust_policy)
        )
        role_arn = role_response["Role"]["Arn"]
        policy_arn = create_policy(
            PolicyName=policy_name, PolicyDocument=json.dumps(cloudwatch_policy)
        )["Policy"]["Arn"]
        aws_client.iam.attach_role_policy(RoleName=role_name, PolicyArn=policy_arn)
        if is_aws_cloud():
            # w
            time.sleep(20)
        aws_client.sns.set_topic_attributes(
            TopicArn=topic_arn,
            AttributeName="LambdaSuccessFeedbackRoleArn",
            AttributeValue=role_arn,
        )
        aws_client.sns.set_topic_attributes(
            TopicArn=topic_arn,
            AttributeName="LambdaSuccessFeedbackSampleRate",
            AttributeValue="100",
        )
        topic_attributes = aws_client.sns.get_topic_attributes(TopicArn=topic_arn)