text: Title: Docs: Shorten function and class references
  Body: [Sphinx's](https://www.sphinx-doc.org/en/master/usage/configuration.html#confval-default_role) `default_role = "py:obj"` setting was added to our docs build in https://github.com/cleanlab/cleanlab/pull/700. 
  
  This allows us to simplify how we reference functions/classes in our docs from 
  ``` 
  :py:func:`find_label_issues <cleanlab.filter.find_label_issues>` 
  ```
  
  to
  
  ``` 
  `~cleanlab.filter.find_label_issues` 
  ```
  
  This addition will make the raw docstrings much more concise and readable. 
  
  ### Important Note:
  This leading tilde will now shorten the hyperlinked text to just the function/class name. (ie. `` `~cleanlab.file.function_or_class_name` `` will be shortened to only display `function_or_class_name`). 
  
  This behaviour is not always desirable, as we sometimes want to additionally specify the module which the function/class belongs to (eg. [this docstring](https://github.com/cleanlab/cleanlab/blob/master/cleanlab/token_classification/rank.py#L77)). In that situation we should still use the existing method, `` :py:func:`file.function_name <cleanlab.file.function_name>` ``, to differentiate between the functions from different modules.
  
  ### Improvements:
  This update has already been done for the `outlier.py` module. Remaining files that can be improved include:
  - [ ] classification.py
  - [ ] count.py
  - [ ] dataset.py
  - [ ] filter.py
  - [ ] multiannotator.py
  - [ ] rank.py
  - [ ] files in datalab/
  - [ ] files in token_classification/
  - [ ] files in multilabel_classification/
  - [ ] files in models/
  - [ ] files in experimental/
  - [ ] files in internal/
  - [ ] files in benchmarking/