### 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
ReturnSubscriptionArn=True,
        )
        message = json.dumps({"message": "hello world"})
        message_attributes = {
            "testAttribute": {"DataType": "String", "StringValue": "valueOfAttribute"}
        }
        aws_client.sns.publish(
            TopicArn=topic["TopicArn"], Message=message, MessageAttributes=message_attributes
        )
        def validate_content():
            files = aws_client.s3.list_objects(Bucket=bucket_name)["Contents"]
            f = BytesIO()
            aws_client.s3.download_fileobj(bucket_name, files[0]["Key"], f)
            content = to_str(f.getvalue())
            sns_message = json.loads(content.split("\n")[0])
            assert "Type" in sns_message
            assert "MessageId" in sns_message
            assert "Message" in sns_message
            assert "Timestamp" in sns_message
            assert message == sns_message["Message"]
        retries = 5
        sleep = 1
        sleep_before = 0
        if is_aws_cloud():
            retries = 30
            sleep = 10
            sleep_before = 10
        retry(validate_content, retries=retries, sleep_before=sleep_before, sleep=sleep)
    @pytest.mark.aws_validated
    def test_empty_or_wrong_message_attributes(