### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

When re-subscribing an SQS queue to an SNS topic with the attribute "RawMessageDelivery=true", localstack throws an error.
It's occuring both on my AWS Java Client and with CLI awslocal
it's working well without this attribute


### Expected Behavior

Since the queue is subscribed with the attribute "RawMessageDelivery=true" to the topic already, it should be a no-op and simply return the same subscription arn.



### 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

#### Client commands (e.g., AWS SDK code snippet, or sequence of "awslocal" commands)

```
awslocal sns create-topic --name localstack-topic
awslocal sqs create-queue --queue-name localstack-queue

awslocal sns subscribe   --topic-arn arn:aws:sns:eu-central-1:000000000000:localstack-topic    --protocol sqs    --notification-endpoint arn:aws:sqs:eu-central-1:000000000000:localstack-queue    --return-subscription-arn  --attributes RawMessageDelivery=True

awslocal sns subscribe   --topic-arn arn:aws:sns:eu-central-1:000000000000:localstack-topic    --protocol sqs    --notification-endpoint arn:aws:sqs:eu-central-1:000000000000:localstack-queue    --return-subscription-arn  --attributes RawMessageDelivery=True
```

### Environment

```markdown
aws-cli/1.22.34 Python/3.10.12 Linux/6.2.0-32-generic botocore/1.31.47
```


### Anything else?

subscription created with "RawMessageDelivery=true"

![image](https://github.com/localstack/localstack/assets/98832464/faac719d-b5fe-4920-a756-28abc17fd0e7)


but if the subscription is created without attributes it's working well 

![image](https://github.com/localstack/localstack/assets/98832464/44ed7afd-a3b2-4a19-aff4-cba7b75ad52c)


maybe it's related to https://github.com/localstack/localstack/issues/9058
)
        assert poll_condition(
            lambda: len(server.log) >= 1,
            timeout=5,
        )
        sub_request, _ = server.log[0]
        payload = sub_request.get_json(force=True)
        assert payload["Type"] == "SubscriptionConfirmation"
        assert sub_request.headers["x-amz-sns-message-type"] == "SubscriptionConfirmation"
        subscribe_url = payload["URL"]
        service_url, subscribe_url_path = payload["URL"].rsplit("/", maxsplit=1)
        confirm_subscribe_request = requests.get(subscribe_url)
        confirm_subscribe = xmltodict.parse(confirm_subscribe_request.content)
        assert (
            confirm_subscribe["ConfirmSubscriptionResponse"]["ConfirmSubscriptionResult"][
                "SubscriptionArn"
            ]
            == http_subscription_arn
        )
        subscription_attributes = aws_client.sns.get_subscription_attributes(
            SubscriptionArn=http_subscription_arn
        )
        assert subscription_attributes["Attributes"]["PendingConfirmation"] == "false"
        server.stop()
        wait_for_port_closed(server.port)
        message = "test_dlq_external_http_endpoint"
        aws_client.sns.publish(TopicArn=topic_arn, Message=message)
        response = aws_client.sqs.receive_message(QueueUrl=dlq_url, WaitTimeSeconds=3)
        assert (
            len(response["Messages"]) == 1