### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

It seems that it is possible to receive sns message in an sqs listener if there is a filterpolicy in place for null value in a message attribute, and a message is being sent without the message attribute.

### Expected Behavior

Don't recieve these type of messages

### How are you starting LocalStack?

With a docker-compose file

### Steps To Reproduce

`sns subscribe --topic-arn "demoTopicArn"  --protocol sqs --notification-endpoint "demoSqsEndpoint" --attributes '{"RawMessageDelivery": "true"}'`
`sns set-subscription-attributes --subscription-arn demoSubsArn --attribute-name FilterPolicy --attribute-value '{"testForNull": [null,{"anything-but": ["notgood"]}]}'`
`sns publish --topic-arn demoTopicArn --message "testforrecieval"`
`sqs receive-message --queue-url  "demoUrl"`

### Environment

```markdown
- OS: macOS 13.6
- LocalStack: 2.2.0
```


### Anything else?

_No response_
subscription_arn = subscription["SubscriptionArn"]
            subscription_attrs = aws_client.sns.get_subscription_attributes(
                SubscriptionArn=subscription_arn
            )
            assert subscription_attrs["Attributes"]["PendingConfirmation"] == "false"
        retry(check_subscription, retries=PUBLICATION_RETRIES, sleep=PUBLICATION_TIMEOUT)
        aws_client.sns.publish(TopicArn=topic_arn, Subject=subject, Message=message)
        
        events = retry(
            check_expected_lambda_log_events_length,
            retries=10,
            sleep=1,
            function_name=function_name,
            expected_length=1,
            regex_filter="Records.*Sns",
            logs_client=aws_client.logs,
        )
        notification = events[0]["Records"][0]["Sns"]
        snapshot.match("notification", notification)
    @markers.aws.validated
    def test_sns_topic_as_lambda_dead_letter_queue(
        self,
        lambda_su_role,
        create_lambda_function,
        sns_create_topic,
        sqs_create_queue,