[Reland] fix missing-prototypes warnings in torch_cpu (Part 4) (#101949)
This PR relands the changes introduced in PR #100849. The old PR turnd nnc_aten_embedding into a static function, however, it is actually used in torch/csrc/jit/tensorexpr/operators/misc.cpp.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/101949
Approved by: https://github.com/albanD
