### 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_
sns_subscription(
            TopicArn=topic_arn,
            Protocol="application",
            Endpoint=endpoint_arn,
        )
        # e
        # h
        message = json.dumps({"APNS": json.dumps({"aps": {"content-available": 1}})})
        message_for_topic = {
            "default": "This is the default message which must be present when publishing a message to a topic.",
            "APNS": json.dumps({"aps": {"content-available": 1}}),
        }
        message_for_topic_string = json.dumps(message_for_topic)
        message_attributes = {
            "AWS.SNS.MOBILE.APNS.TOPIC": {
                "DataType": "String",
                "StringValue": "com.amazon.mobile.messaging.myapp",
            },
            "AWS.SNS.MOBILE.APNS.PUSH_TYPE": {
                "DataType": "String",
                "StringValue": "background",
            },
            "AWS.SNS.MOBILE.APNS.PRIORITY": {
                "DataType": "String",
                "StringValue": "5",
            },
        }
        # p
        aws_client.sns.publish(
            TopicArn=topic_arn,