type annotate operator_support (#65136)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/65136
Opportunistically add type annotation for operator_support.py
Test Plan: run linter, CI
Reviewed By: yinghai
Differential Revision: D30928464
fbshipit-source-id: 615c75152b9938792f03cdceb2a113bda6ab28c7
