### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

When passed to SQS, keys of the messages attributes on SNS are renamed from StringValue to Value and DataType to Type.

### Expected Behavior

The keys should not be renamed

### How are you starting LocalStack?

With a docker-compose file

### Steps To Reproduce

#### How are you starting localstack (e.g., `bin/localstack` command, arguments, or `docker-compose.yml`)

    docker run localstack/localstack

#### Flow
 - Create a SQS Queue
 - Create a SNS Topic
 - Configure a Subscription of the new Topic that sends to the SQS queue (specify a raw delivery at true)
 - Publish a message to SNS Topic with attribute { DataType: "string", StringValue: "anything"}
 - Attributes are no more StringValue but just value. 

(can't provide more, I have issues with my awslocal, I got this issue with the PHP client initially)

### Environment

```markdown
- OS: Docker Desktop for mac
- LocalStack: 1.4
```


### Anything else?

The AWS SNS official documentation : https://docs.aws.amazon.com/sns/latest/api/API_MessageAttributeValue.html


MR for fix is coming
self, sns_create_topic, sns_subscription, aws_client
    ):
        # c
        topic_arn = sns_create_topic()["TopicArn"]
        # b
        _requests = queue.Queue()
        # c
        def handler(request):
            _requests.put(request)
            return Response(status=429)
        number_of_endpoints = 4
        servers = []
        try:
            for _ in range(number_of_endpoints):
                server = HTTPServer()
                server.start()
                servers.append(server)
                server.expect_request("/").respond_with_handler(handler)
                http_endpoint = server.url_for("/")
                wait_for_port_open(http_endpoint)
                sns_subscription(TopicArn=topic_arn, Protocol="http", Endpoint=http_endpoint)