[typing] ignore mypy false positives in aten_test.py (#52370)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/52370
After adding .pyi stubs for torch / caffe2 protos, there were some mypy false positives (https://github.com/pytorch/pytorch/pull/52341). We tell mypy to ignore the offending file here.
Test Plan: Let CI run.
Reviewed By: malfet, dzhulgakov
Differential Revision: D26490302
fbshipit-source-id: 87cdfd7419efdc7abece9ca975a464201732b7a0
