Make the __call__ op of ExportedProgram follow calling convention. (#106186)
Convention documented here: https://github.com/pytorch/pytorch/blob/01069ad4be449f376cf88a56d842b8eb50f6e9b6/torch/_functorch/aot_autograd.py#L1034
Fixes #ISSUE_NUMBER
Pull Request resolved: https://github.com/pytorch/pytorch/pull/106186
Approved by: https://github.com/zhxchen17