Fix named tensor build (#25673)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/25673
We recently moved new_empty into ATen. new_empty doesn't support named
tensors (in fact, it was hackily supporting named tensors before). This
fixes the named tensor test by changing all uses of `new_empty` to
`empty`.
Named tensor support for `new_empty` will come eventually, but it might
be a little tricky.
Test Plan: - [namedtensor ci]
Differential Revision: D17206043
Pulled By: zou3519
fbshipit-source-id: 1697bd1d63e7cb344f3d459a29af0fcb9696ea49
