Look for unqualified ignore in .pyi, not just .py (#57468)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/57468
Test Plan:
On the commit that expanded the lints but didn't remove the `# type: ignore` comment, the quick-checks job failed:
- https://github.com/pytorch/pytorch/runs/2493713340
In contrast, on the tip of this PR, both the quick-checks job and the mypy job succeed:
- https://github.com/pytorch/pytorch/runs/2493744907
- https://github.com/pytorch/pytorch/runs/2493746144
Reviewed By: driazati
Differential Revision: D28153020
Pulled By: samestep
fbshipit-source-id: 5e21bde38ab741e87b3e5f3d45e7e50456fd7ec9