Fix names of some reference functions (#88115)
The `__name__` field of some binary reference functions was wrong. We
fix this to be consistent with unary reference functions. In the future,
we should probably make the binary reference wrapper return a wrapper
itself to avoid all those calls to `partial`.
This change helps performing some homogeneous treatment of functions by
their name.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/88115
Approved by: https://github.com/mruberry
