### 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
)
        assert subscription_attributes["Attributes"]["PendingConfirmation"] == "false"
        message = "test_external_http_endpoint"
        aws_client.sns.publish(TopicArn=topic_arn, Message=message)
        assert poll_condition(
            lambda: len(server.log) >= 2,
            timeout=5,
        )
        notification_request, _ = server.log[1]
        assert notification_request.headers["x-amz-sns-message-type"] == "Notification"
        expected_unsubscribe_url = (
            f"{service_url}/?Action=Unsubscribe&SubscriptionArn={subscription_arn}"
        )
        if raw_message_delivery:
            payload = notification_request.data.decode()
            assert payload == message
        else:
            payload = notification_request.get_json(force=True)
            assert payload["Type"] == "Notification"
            assert "Signature" in payload
            assert "SigningCertURL" in payload
            assert payload["Message"] == message
            assert payload["UnsubscribeURL"] == expected_unsubscribe_url
            snapshot.match("http-message", payload)
        unsub_request = requests.get(expected_unsubscribe_url)
        unsubscribe_confirmation = xmltodict.parse(unsub_request.content)
        assert "UnsubscribeResponse" in unsubscribe_confirmation
        snapshot.match("unsubscribe-response", _get_snapshot_requests_response(unsub_request))
        assert poll_condition(
            lambda: len(server.log) >= 3,