Require matches_jit_signature within native_functions.yaml (#18956)
Summary:
"""
This will verify that the func syntax follows the JIT signature schema. If you are a developer outside the core team, set this to False first to help us track unification. After your tests pass try setting this to True once and leave it set to True if it doesn't trigger any asserts. This means that your signature happens to be compliant. In general, 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 assert coverage of all functions by each component.
"""
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18956
Differential Revision: D14807952
Pulled By: cpuhrsch
fbshipit-source-id: 42dac49269fb3cd96dc62e0b10820d0c32c7fb0e
