Add support for auto_docstring with model outputs (#38242)
* experiment auto_docstring model outputs
* Fix PatchTSMixer
* Add check model output docstring to check_auto_docstring and fix all model outputs docstring
* add reordering of docstring in check_docstrings
* add check for redundant docstring in check_docstrings, remove redundant docstrings
* refactor check_auto_docstring
* make style
* fix copies
* remove commented code
* change List-> list Tuple-> tuple in docstrings
* fix modular
* make style
* Fix modular vipllava
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Co-authored-by: Cyril Vallez <cyril.vallez@huggingface.co>