### 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
), 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
            assert response["SubscriptionArn"] == sub_1["SubscriptionArn"]
            # a
            sub_1_attrs = aws_client.sns.get_subscription_attributes(
                SubscriptionArn=sub_1["SubscriptionArn"]
            )