### 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
account_id = request.args.get("accountId", DEFAULT_AWS_ACCOUNT_ID)
        region = request.args.get("region", AWS_REGION_US_EAST_1)
        filter_phone_number = request.args.get("phoneNumber")
        store: SnsStore = sns_stores[account_id][region]
        if filter_phone_number:
            messages = [
                m for m in store.sms_messages if m.get("PhoneNumber") == filter_phone_number
            ]
            messages = _format_messages(messages, self._PAYLOAD_FIELDS)
            return {
                "sms_messages": {filter_phone_number: messages},
                "region": region,
            }
        sms_messages = {}
        for m in _format_messages(store.sms_messages, self._PAYLOAD_FIELDS):
            sms_messages.setdefault(m.get("PhoneNumber"), []).append(m)
        return {
            "sms_messages": sms_messages,
            "region": region,
        }
    @route(sns_constants.SMS_MSGS_ENDPOINT, methods=["DELETE"])
    def on_delete(self, request: Request) -> Response: