### 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 (
            api_platform_endpoints_msgs[endpoint_arn][0]["MessageAttributes"] == message_attributes
        )
        # E
        msg_with_region = requests.get(msgs_url, params={"region": "eu-west-1"}).json()
        assert len(msg_with_region["platform_endpoint_messages"]) == 0
        assert msg_with_region["region"] == "eu-west-1"
        # E
        api_contents_with_endpoint = requests.get(
            msgs_url, params={"endpointArn": endpoint_arn}
        ).json()
        msgs_with_endpoint = api_contents_with_endpoint["platform_endpoint_messages"]
        assert len(msgs_with_endpoint) == 1
        assert len(msgs_with_endpoint[endpoint_arn]) == 1
        assert api_contents_with_endpoint["region"] == "us-east-1"
        # E
        delete_res = requests.delete(msgs_url, params={"endpointArn": endpoint_arn})
        assert delete_res.status_code == 204
        api_contents_with_endpoint = requests.get(
            msgs_url, params={"endpointArn": endpoint_arn}
        ).json()
        msgs_with_endpoint = api_contents_with_endpoint["platform_endpoint_messages"]
        assert len(msgs_with_endpoint[endpoint_arn]) == 0
        # E
        delete_res = requests.delete(msgs_url, params={"region": "us-east-1"})
        assert delete_res.status_code == 204
        msg_with_region = requests.get(msgs_url, params={"region": "us-east-1"}).json()
        assert not msg_with_region["platform_endpoint_messages"]
    @pytest.mark.only_localstack
    def test_publish_to_platform_endpoint_is_dispatched(