[BE]: Enable ruff's flake8-PYI rules (#110830)
Enable Flake8-PYI rules codebase wide. Most of the rules already match our codebase style, the remaining ones that were not autofixed I have added to the pyproject.toml to be enabled in a later PR.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/110830
Approved by: https://github.com/albanD
