handle get_attr opearations in typechecker (#62682)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/62682
Test Plan: Imported from OSS
Reviewed By: jamesr66a
Differential Revision: D30107789
Pulled By: migeed-z
fbshipit-source-id: 0b21b2893e2dc7cfaf5b5f5990f662e051a981b4
