Add support for __all__ and potentilly deleting functions (#33859)

* Add support for __all__ and potentailly deleting functions

* updates

* update

* nits

* remove dummies

* fix warning

* fixup

* style

* update

* fixup

* skip copied from when # skip

* remove log

* bring dummies back

* fixup

* remove copied from

* fixup

* remove warnings from `make fix-copies`

* fix doc issues

* nits

* Better error message !

* add support for more flexible naming!

* style

* breaking style?

* fix super() renaming issues

* del not needed when you don't call super().__init__()

* style

* no more fmt on :)

* properly remove `self`

* fixup

* fix

* doc nits

* add some doc 🫡

utils/not_doctested.txt

@@ -373,7 +373,6 @@ src/transformers/data/processors/squad.py
 src/transformers/data/processors/utils.py
 src/transformers/data/processors/xnli.py
 src/transformers/debug_utils.py
-src/transformers/deepspeed.py
 src/transformers/dependency_versions_check.py
 src/transformers/dependency_versions_table.py
 src/transformers/dynamic_module_utils.py