### 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_
result = self.sqs_client.receive_message(
                QueueUrl=self.dlq_url, MessageAttributeNames=["All"]
            )
            self.assertGreater(len(result["Messages"]), 0)
            self.assertEqual(
                json.loads(json.loads(result["Messages"][0]["Body"])["Message"][0])["message"],
                "test_redrive_policy",
            )
        retry(receive_dlq, retries=10, sleep=2)
    def test_redrive_policy_queue_subscription(self):
        self.unsubscribe_all_from_sns()
        topic_arn = self.sns_client.create_topic(Name="topic-%s" % short_uid())["TopicArn"]
        invalid_queue_arn = aws_stack.sqs_queue_arn("invalid_queue")
        # s
        subscription = self.sns_client.subscribe(
            TopicArn=topic_arn, Protocol="sqs", Endpoint=invalid_queue_arn
        )
        self.sns_client.set_subscription_attributes(
            SubscriptionArn=subscription["SubscriptionArn"],
            AttributeName="RedrivePolicy",
            AttributeValue=json.dumps(
                {"deadLetterTargetArn": aws_stack.sqs_queue_arn(TEST_QUEUE_DLQ_NAME)}
            ),
        )
        self.sns_client.publish(
            TopicArn=topic_arn, Message=json.dumps({"message": "test_redrive_policy"})
        )
        def receive_dlq():