### 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_
"key_a": ["value_one"],
            "key_b": ["value_two"],
            "key_c": ["value_three"],
            "key_d": ["value_four"],
            "key_e": ["value_five"],
            "key_f": ["value_six"],
        }
        # A 
        with pytest.raises(ClientError) as e:
            aws_client.sns.set_subscription_attributes(
                SubscriptionArn=subscription_arn,
                AttributeName="FilterPolicy",
                AttributeValue=json.dumps(flat_filter_policy),
            )
        snapshot.match("sub-filter-policy-max-attr-keys", e.value.response)
        flat_filter_policy = {"key_a": "value_one"}
        # R
        with pytest.raises(ClientError) as e:
            aws_client.sns.set_subscription_attributes(
                SubscriptionArn=subscription_arn,
                AttributeName="FilterPolicy",
                AttributeValue=json.dumps(flat_filter_policy),
            )
        snapshot.match("sub-filter-policy-rule-no-list", e.value.response)
        assert e.value.response["Error"]["Message"].startswith(
            'Invalid parameter: FilterPolicy: "key_a" must be an object or an array'
        )
    @markers.aws.validated
    @pytest.mark.parametrize("raw_message_delivery", [True, False])
    def test_filter_policy_on_message_body(