### 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_
"""Called upon deletion of an SQS queue, to remove the queue from subscriptions"""
    sns_backend = SNSBackend.get()
    for topic_arn, subscriptions in sns_backend.sns_subscriptions.items():
        subscriptions = sns_backend.sns_subscriptions.get(topic_arn, [])
        for subscriber in list(subscriptions):
            sub_url = subscriber.get("sqs_queue_url") or subscriber["Endpoint"]
            if queue_url == sub_url:
                subscriptions.remove(subscriber)
def message_to_subscribers(
    message_id,
    message,
    topic_arn,
    req_data,
    headers,
    subscription_arn=None,
    skip_checks=False,
):
    sns_backend = SNSBackend.get()
    subscriptions = sns_backend.sns_subscriptions.get(topic_arn, [])
    async def wait_for_messages_sent():