add aten symbols for amin and amax (#61550)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/61550
Test Plan: Imported from OSS
Reviewed By: asuhan
Differential Revision: D29668123
Pulled By: bdhirsh
fbshipit-source-id: b111e1c6c6d2beddb220cad70d95954756a3ee9d
