Fast imports part 3 (#9474)

* New intermediate inits

* Update template

* Avoid importing torch/tf/flax in tokenization unless necessary

* Styling

* Shutup flake8

* Better python version check

src/transformers/file_utils.py

@@ -51,7 +51,7 @@ from .utils import logging
 
 
 # The package importlib_metadata is in a different place, depending on the python version.
-if version.parse(sys.version) < version.parse("3.8"):
+if sys.version_info < (3, 8):
     import importlib_metadata
 else:
     import importlib.metadata as importlib_metadata