### Is there an existing issue for this?

- [X] I have searched the existing issues and read the documentation

### Question

I'm trying to implement locally DLQ for SNS with SQS, the problem is, on localstack SQS DLQ message coming from SNS have different format than what you would expect in AWS

When I tested locally I received the message in the following format:

`"{\"Action\": [\"Publish\"], \"Message\": [\"(The original SNS message body here)\"], \"TopicArn\": [\"the topic arn in localstack\"], \"Version\": [\"2010-03-31\"]}"`

I'm using local stack 0.14.0 with docker-compose

my docker-compose file looks like this:


```
 aws:
    image: localstack/localstack:0.14.0
    restart: always
    volumes:
      - ./docker-mounts/localstack:/docker-entrypoint-initaws.d
    environment:
      - SERVICES=sqs,s3,ses,sns
      - DEFAULT_REGION=eu-west-1
      - HOSTNAME_EXTERNAL=aws.localtest.local
      - AWS_ACCESS_KEY_ID=foo
      - AWS_SECRET_ACCESS_KEY=bar
      - AWS_DEFAULT_REGION=eu-west-1
```

### Anything else?

_No response_
if not dlq_arn:
        return
    LOG.info("Sending failed execution %s to dead letter queue %s", source_arn, dlq_arn)
    messages = _prepare_messages_to_dlq(source_arn, event, error)
    if ":sqs:" in dlq_arn:
        queue_url = aws_stack.get_sqs_queue_url(dlq_arn)
        sqs_client = aws_stack.connect_to_service("sqs")
        error = None
        result_code = None
        try:
            result = sqs_client.send_message_batch(QueueUrl=queue_url, Entries=messages)
            result_code = result.get("ResponseMetadata", {}).get("HTTPStatusCode")
        except Exception as e:
            error = e
        if error or not result_code or result_code >= 400:
            msg = "Unable to send message to dead letter queue %s (code %s): %s" % (
                queue_url,
                result_code,
                error,
            )
            if "InvalidMessageContents" in str(error):
                msg += f" - messages: {messages}"
            LOG.info(msg)
            raise Exception(msg)
    elif ":sns:" in dlq_arn:
        sns_client = aws_stack.connect_to_service("sns")
        for message in messages:
            sns_client.publish(