Add torch::nn::functional to C++/Python parity tracker (#29819)
Summary:
This PR adds all `torch::nn::functional` functions and updated their parity status in the C++/Python parity tracker.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/29819
Differential Revision: D18617762
Pulled By: yf225
fbshipit-source-id: 75a4d770e2da28b626f785cab243465dbc51efd1
