Add Gelu To NNC (#57753)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/57753
I'm not adding symbolic gradient because that is being added in https://github.com/pytorch/pytorch/pull/46785.
Test Plan: Imported from OSS
Reviewed By: navahgar
Differential Revision: D28262765
Pulled By: eellison
fbshipit-source-id: be365a2d392d7ac4bcc099a184762249ec2e18a6
