Add names= argument to torch.tensor ctor (#25424)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/25424
Test Plan
- new tests [namedtensor ci]
Test Plan: Imported from OSS
Differential Revision: D17120399
Pulled By: zou3519
fbshipit-source-id: 93d7944f2ec4c5a7256f505323b879af706131df
