Move common autograd utils functions from gen_variable_type.py to api/autograd.py. (#53340)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/53340
Test Plan: Imported from OSS
Reviewed By: nikithamalgifb
Differential Revision: D26973914
Pulled By: ailzhang
fbshipit-source-id: 8367a08b27b25808782c77aadc3c67d07c354957
