### 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
try:
                # A
                aws_client.sns.set_subscription_attributes(
                    SubscriptionArn=subscription_arn,
                    AttributeName="RawMessageDelivery",
                    AttributeValue="true",
                )
                raise Exception("Subscription is not deleted")
            except ClientError as e:
                assert e.response["Error"]["Code"] == "NotFound"
                assert e.response["ResponseMetadata"]["HTTPStatusCode"] == 404
                snapshot.match("sub-not-found", e.response)
        retry(check_subscription_deleted, retries=10, sleep_before=0.2, sleep=3)
        subscriptions_by_topic = aws_client.sns.list_subscriptions_by_topic(TopicArn=topic_arn)
        snapshot.match("subscriptions-for-topic-after-unsub", subscriptions_by_topic)
        assert len(subscriptions_by_topic["Subscriptions"]) == 0
    @pytest.mark.aws_validated
    @pytest.mark.parametrize("content_based_deduplication", [True, False])
    def test_message_to_fifo_sqs(