Add overload names to native_functions.yaml (#23532)
Summary:
We need this to be able to register them with the c10 dispatcher.
The overload names are based on one-letter-per-argument-type.
Script used to change native_functions.yaml and derivatives.yaml: P75630718
Pull Request resolved: https://github.com/pytorch/pytorch/pull/23532
ghstack-source-id: 87539687
Differential Revision: D16553437
fbshipit-source-id: a1d0f10c42d284eba07e2a40641f71baa4f82ecf
