### 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_
# s
            endpoints_arn[platform_type] = endpoint_arn
            # s
            sns_subscription(
                TopicArn=topic_arn,
                Protocol="application",
                Endpoint=endpoint_arn,
            )
        # n
        message = {
            "default": "This is the default message which must be present when publishing a message to a topic.",
            "APNS": '{"aps":{"alert": "Check out these awesome deals!","url":"www.amazon.com"} }',
            "GCM": '{"data":{"message":"Check out these awesome deals!","url":"www.amazon.com"}}',
        }
        # p
        aws_client.sns.publish(
            TopicArn=topic_arn,
            Message=json.dumps(message),
            MessageStructure="json",
        )
        sns_backend = SnsProvider.get_store(TEST_AWS_ACCOUNT_ID, TEST_AWS_REGION_NAME)
        platform_endpoint_msgs = sns_backend.platform_endpoint_messages
        # a
        def check_message():
            assert len(platform_endpoint_msgs[endpoint_arn]) > 0
        retry(check_message, retries=PUBLICATION_RETRIES, sleep=PUBLICATION_TIMEOUT)
        # e
        assert platform_endpoint_msgs[endpoints_arn["GCM"]][0]["Message"] == message["GCM"]
        assert platform_endpoint_msgs[endpoints_arn["APNS"]][0]["Message"] == message["APNS"]
class TestSNSSMS: