Rename tensor.view_names -> tensor.renamed (#25711)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/25711
This function renames the dimensions of a tensor out-of-place. Because
of that, I think `tensor.renamed(...)` is a clearer name: `view_names`
has the connotation that we can use names to `view` our tensors with a
"different shape", but what this function really does is let us rename a
tensor no matter the previous names.
`tensor.names_`, the in-place version of this, is unchanged for now.
However, we might delete this or not advertise it if it has no use case
and also because its naming is a little inconsistent with `tensor.renamed`.
Test Plan: - [namedtensor ci]
Differential Revision: D17206515
Pulled By: zou3519
fbshipit-source-id: 67053951fcc8130c84566b5ebbdce35ef619c90d
