### 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
# f
            subscription_list = aws_client.sns.list_subscriptions_by_topic(TopicArn=topic_arn)
            assert subscription_list["ResponseMetadata"]["HTTPStatusCode"] == 200
            assert (
                len(subscription_list["Subscriptions"]) == number_of_endpoints
            ), f"unexpected number of subscriptions {subscription_list}"
            tokens = []
            for _ in range(number_of_endpoints):
                request = _requests.get(timeout=2)
                request_data = request.get_json(True)
                tokens.append(request_data["Token"])
                assert request_data["TopicArn"] == topic_arn
            with pytest.raises(queue.Empty):
                # m
                _requests.get(timeout=1)
            # a
            sub_1 = subscription_list["Subscriptions"][0]
            sub_1_attrs = aws_client.sns.get_subscription_attributes(
                SubscriptionArn=sub_1["SubscriptionArn"]
            )
            assert sub_1_attrs["Attributes"]["PendingConfirmation"] == "true"
            # a
            sub_2 = subscription_list["Subscriptions"][1]
            sub_2_attrs = aws_client.sns.get_subscription_attributes(
                SubscriptionArn=sub_2["SubscriptionArn"]
            )
            assert sub_2_attrs["Attributes"]["PendingConfirmation"] == "true"
            # c
            response = aws_client.sns.confirm_subscription(TopicArn=topic_arn, Token=tokens[0])
            # a