### 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_
from mypy_boto3_es import ElasticsearchServiceClient
    from mypy_boto3_events import EventBridgeClient
    from mypy_boto3_firehose import FirehoseClient
    from mypy_boto3_iam import IAMClient
    from mypy_boto3_kinesis import KinesisClient
    from mypy_boto3_kms import KMSClient
    from mypy_boto3_lambda import LambdaClient
    from mypy_boto3_logs import CloudWatchLogsClient
    from mypy_boto3_s3 import S3Client
    from mypy_boto3_secretsmanager import SecretsManagerClient
    from mypy_boto3_ses import SESClient
    from mypy_boto3_sns import SNSClient
    from mypy_boto3_sqs import SQSClient
    from mypy_boto3_ssm import SSMClient
    from mypy_boto3_stepfunctions import SFNClient
LOG = logging.getLogger(__name__)
def _client(service):
    if os.environ.get("TEST_TARGET") == "AWS_CLOUD":
        return boto3.client(service)
    
    config = (
        botocore.config.Config(
            connect_timeout=1_000, read_timeout=1_000, retries={"total_max_attempts": 1}
        )
        if os.environ.get("TEST_DISABLE_RETRIES_AND_TIMEOUTS")
        else None
    )
    return aws_stack.connect_to_service(service, config=config)
@pytest.fixture(scope="class")
def dynamodb_client() -> "DynamoDBClient":