Right now, get_model_status() and get_layer_status() only report on
BaseTunerLayers, but it would be helpful if they could also report
auxiliary modules. This PR now includes those.
To facilitate this, a few attributes and methods were added to
AuxiliaryTrainingWrapper and subclasses to make them more similar to
BaseTunerLayer (e.g. the adapter_layer_names attribute). These
attributes and methods were assumed to be present in the code that
determines the model and layer status.