Nan in linalg eig (#67544)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/61251. As per the comment here (https://github.com/pytorch/pytorch/issues/61251#issuecomment-954676082), a consensus has been reached to raise an error if there is a NaN value in the input when calling `eig()`. This PR implements that feature.
cc jianyuh nikitaved pearu mruberry walterddr IvanYashchuk xwang233 Lezcano
Pull Request resolved: https://github.com/pytorch/pytorch/pull/67544
Reviewed By: malfet
Differential Revision: D32310919
Pulled By: mruberry
fbshipit-source-id: fc74a1ae2d929157c2d4c9051e3e9a4bf03dd5be
