### 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
"""Provides a REST API for retrospective access to platform endpoint messages sent via SNS.
    This is registered as a LocalStack internal HTTP resource.
    This endpoint accepts:
    - GET param `accountId`: selector for AWS account. If not specified, return fallback `000000000000` test ID
    - GET param `region`: selector for AWS `region`. If not specified, return default "us-east-1"
    - GET param `endpointArn`: filter for `endpointArn` resource in SNS
    - DELETE param `accountId`: selector for AWS account
    - DELETE param `region`: will delete saved messages for `region`
    - DELETE param `endpointArn`: will delete saved messages for `endpointArn`
    """
    _PAYLOAD_FIELDS = [
        "TargetArn",
        "TopicArn",
        "Message",
        "MessageAttributes",
        "MessageStructure",
        "Subject",
        "MessageId",
    ]
    @route(sns_constants.PLATFORM_ENDPOINT_MSGS_ENDPOINT, methods=["GET"])
    def on_get(self, request: Request):