### 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_
platform_type = get_platform_type_from_endpoint_arn(endpoint)
        return {
            "TargetArn": endpoint,
            "TopicArn": "",
            "SubscriptionArn": "",
            "Message": message_context.message_content(protocol=platform_type),
            "MessageAttributes": message_context.message_attributes,
            "MessageStructure": message_context.message_structure,
            "Subject": message_context.subject,
            "MessageId": message_context.message_id,
        }
    @staticmethod
    def _legacy_publish_to_gcm(context: SnsPublishContext, endpoint: str):
        application_attributes, endpoint_attributes = get_attributes_for_application_endpoint(
            endpoint
        )
        send_message_to_gcm(
            context=context,
            app_attributes=application_attributes,
            endpoint_attributes=endpoint_attributes,
        )
def get_platform_type_from_endpoint_arn(endpoint_arn: str) -> SnsApplicationPlatforms: