Named tensor support for: index_fill_, index_fill, squeeze, median(Tensor) (#26914)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/26914
Also added dimname overloads for index_fill_ and squeeze.
Test Plan: - [namedtensor ci]
Differential Revision: D17609136
Pulled By: zou3519
fbshipit-source-id: 29c7ad52ffe24e0b3ad679111fee7a78eca7acdf
