### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

When you publish a message to SNS without a *body* (e.g. only attributes) it succeeds.

### Expected Behavior

Trying to publish a message without a *body* should fail (at least it does when trying to do this in AWS)

### How are you starting LocalStack?

Custom (please describe below)

### Steps To Reproduce

#### How are you starting localstack (e.g., `bin/localstack` command, arguments, or `docker-compose.yml`)

using Java testcontainers...

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

```bash
#!/bin/sh
 
queue_arn=$(awslocal sqs create-queue --queue-name $QUEUE_NAME --output text)
echo "Queue ARN: $queue_arn"

topic_arn=$(awslocal sns create-topic --name $TOPIC_NAME --output text)
echo "Topic ARN: $topic_arn"

subscription_arn=$(awslocal sns subscribe \
    --attributes RawMessageDelivery=true \
    --topic-arn "$topic_arn" \
    --protocol sqs \
    --notification-endpoint "$queue_arn" \
    --output text)
echo "Subscription ARN: $subscription_arn" 
```


### Environment

```markdown
- OS: OSX 11.5.2
- LocalStack: 0.13.0
- Docker Desktop: v20.10.8
```


### Anything else?

_No response_
kwargs = (
                {"MessageGroupId": message_group_id}
                if message_group_id and SQS_BACKEND_IMPL == "moto"
                else {}
            )
            sqs_client.send_message(
                QueueUrl=queue_url,
                MessageBody=create_sns_message_body(subscriber, req_data, message_id),
                MessageAttributes=create_sqs_message_attributes(subscriber, message_attributes),
                MessageSystemAttributes=create_sqs_system_attributes(headers),
                **kwargs,
            )
            store_delivery_log(subscriber, True, message, message_id)
        except Exception as exc:
            LOG.info("Unable to forward SNS message to SQS: %s %s" % (exc, traceback.format_exc()))
            store_delivery_log(subscriber, False, message, message_id)
            sns_error_to_dead_letter_queue(subscriber["SubscriptionArn"], req_data, str(exc))
            if "NonExistentQueue" in str(exc):
                LOG.info(
                    'Removing non-existent queue "%s" subscribed to topic "%s"'
                    % (queue_url, topic_arn)
                )
                subscriptions.remove(subscriber)
        return
    elif subscriber["Protocol"] == "lambda":
        try:
            external_url = external_service_url("sns")
            unsubscribe_url = "%s/?Action=Unsubscribe&SubscriptionArn=%s" % (
                external_url,