### 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_
topic_name = "test-duplicated-topic-more-tags"
        sns_create_topic(Name=topic_name)
        with pytest.raises(ClientError) as e:
            aws_client.sns.create_topic(Name=topic_name, Tags=[{"Key": "key1", "Value": "value1"}])
        snapshot.match("exception-duplicate", e.value.response)
    @pytest.mark.aws_validated
    def test_create_duplicate_topic_check_idempotency(self, sns_create_topic, snapshot):
        topic_name = f"test-{short_uid()}"
        tags = [{"Key": "a", "Value": "1"}, {"Key": "b", "Value": "2"}]
        kwargs = [
            {"Tags": tags},  # t
            {"Tags": [tags[0]]},  # t
            {"Tags": []},  # t
        ]
        # c
        response = sns_create_topic(Name=topic_name, Tags=tags)
        snapshot.match("response-created", response)
        for index, arg in enumerate(kwargs):
            response = sns_create_topic(Name=topic_name, **arg)
            # w
            snapshot.match(f"response-same-arn-{index}", response)
    @pytest.mark.only_localstack
    @pytest.mark.skip(
        reason="Idempotency not supported in Moto backend. See bug https://github.com/spulec/moto/issues/2333"
    )
    def test_create_platform_endpoint_check_idempotency(