[torchscript] Fix constant propagation schemas (#49605)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/49605
Test Plan: Imported from OSS
Reviewed By: eellison
Differential Revision: D25643157
Pulled By: IvanKobzarev
fbshipit-source-id: c5440622f6cf559afadca853e1eb7a9fbb8edf7f
