IManagedMqttClient.SubscribeAsync lacks support for subscription identifiers

### Describe the bug

The `IManagedMqttClient` API lacks the possibility to specify subscription identifiers:

```csharp
Task SubscribeAsync(ICollection topicFilters);
```

The `IMqttClient` interface, on the other hand, allows this because it takes a `MqttClientSubscribeOptions` object:

```csharp
Task SubscribeAsync(MqttClientSubscribeOptions options,
CancellationToken cancellationToken = default);
```

Using the internal client through the `InternalClient` property of `IManagedMqttClient` as a workaround is not an option, because the connection is not guaranteed to be open.

### Which component is your bug related to?

- ManagedClient

### To Reproduce
Steps to reproduce the behavior:
1. Using the latest Nuget version of MQTTnet
2. Try to subscribe and pass a subscription identifier
3. No such method is available

### Expected behavior

The managed client offers the same subscription possibilities as the unmanaged client.