Allow std::array as operator argument and return (#34399)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/34399
Custom ops can now take std::array as arguments and return it.
This PR also moves the ops in native_functions.yaml that were blocked by this to now `use_c10_dispatcher: full`.
ghstack-source-id: 102643208
Test Plan: unit tests
Differential Revision: D20315072
fbshipit-source-id: 93232448663df962f65e0f25bfb35826dd3374f8
