Add matches_jit_signature attribute to native_functions.yaml (#16040)

Add matches_jit_signature attribute to native_functions.yaml (#16040)

Summary:
If "matches_jit_signature" is set to True for a particular function, we will assume that the func syntax follows the JIT signature syntax. This is a temporary attribute and doesn't need to be set by developers outside the core team. It serves as a means of tracking an ongoing schema unification with the goal of aligning func syntax with other components of PyTorch in order to reduce overall complexity and match coverage of different function descriptions.

Followup PRs might be about removing _out from native_functions.yaml and using Tensor annotations instead, etc.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/16040

Reviewed By: ezyang

Differential Revision: D13703176

Pulled By: cpuhrsch

fbshipit-source-id: ce248e1823a6f18efa95502f9f3eebf023b4a46c