### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

I am using Terraform (via CDKTF) to create SNS Topics, explicitely stating that I want to use SignatureVersion 2:

```ts
const myTopic = new SnsTopic(this, 'topic', {
    name: 'myTopic',
    signatureVersion: 2,
  })
```

However, on every plan / apply, I see this logged, just like the signatureVersion wasn't set properly on the topic (see screenshot below showing the planned changes). I can also confirm that my Sns subscription receives a SignatureVersion of 1 all the time.

<img width="377" alt="image" src="https://github.com/localstack/localstack/assets/3542313/6039191e-56b3-4359-bcb3-02da94adca59">



### Expected Behavior

The SignatureVersion should be properly set on the SnsTopic to 2.

### How are you starting LocalStack?

With a docker-compose file

### Steps To Reproduce

#### How are you starting localstack (e.g., `bin/localstack` command, arguments, or `docker-compose.yml`)

docker-compose.yml

```yaml
version: '3.9'
services:
  localstack:
    container_name: "${LOCALSTACK_DOCKER_NAME-localstack_main}"
    image: localstack/localstack-pro:2.1.0
    ports:
      - "127.0.0.1:4566:4566"            # LocalStack Gateway
      - "127.0.0.1:4510-4559:4510-4559"  # external services port range
    environment:
      - DEBUG=${DEBUG-}
      - DOCKER_HOST=unix:///var/run/docker.sock
      - LOCALSTACK_API_KEY=${LOCALSTACK_API_KEY- }
      - LOCALSTACK_ENFORCE_IAM=1
    volumes:
      - "${LOCALSTACK_VOLUME_DIR:-~/.localstack-volume}:/var/lib/localstack"
      - "/var/run/docker.sock:/var/run/docker.sock"
  ```

Ran using `docker compose up -d localstack`

#### Client commands (e.g., AWS SDK code snippet, or sequence of "awslocal" commands)

NA


### Environment

```markdown
- OS: MacOs 13.3.1
- LocalStack: 2.1.0 (Pro)
```


### Anything else?

_No response_
self,
        context: RequestContext,
        subscription_arn: subscriptionARN,
        attribute_name: attributeName,
        attribute_value: attributeValue = None,
    ) -> None:
        store = self.get_store(account_id=context.account_id, region_name=context.region)
        sub = store.subscriptions.get(subscription_arn)
        if not sub:
            raise NotFoundException("Subscription does not exist")
        validate_subscription_attribute(
            attribute_name=attribute_name,
            attribute_value=attribute_value,
            topic_arn=sub["TopicArn"],
        )
        try:
            call_moto(context)
        except CommonServiceException as e:
            
            if e.code == "InvalidParameter":
                raise InvalidParameterException(e.message)
            raise
        if attribute_name == "FilterPolicy":
            store = self.get_store(account_id=context.account_id, region_name=context.region)
            store.subscription_filter_policy[subscription_arn] = json.loads(attribute_value)
        sub[attribute_name] = attribute_value
    def confirm_subscription(