text: Title: fix return type of get_label_quality_scores in token classification
  Body: The function only returns a `Tuple[np.ndarray, list]`, but it is annotated with:
  
  https://github.com/cleanlab/cleanlab/blob/fad4eb266dee8b9e2925d3f0d74fe4a81939eb8a/cleanlab/token_classification/rank.py#L36