Add op bitwise_xor to replace __xor__ and __ixor__ (#25665)
Summary:
We define `bitwise_xor` instead of
`__xor__` and `__ixor__`. The reason is that (a) it is not idiomatic to call
functions starting and ending with double underscores, and that (b) the
types of argument that we can add is limited (e.g., no out), and that (c) consistent with the naming of `bitwise_not` and numpy.
Fix https://github.com/pytorch/pytorch/issues/24513, Fix https://github.com/pytorch/pytorch/issues/24517, Fix https://github.com/pytorch/pytorch/issues/24660, Fix https://github.com/pytorch/pytorch/issues/24664
Pull Request resolved: https://github.com/pytorch/pytorch/pull/25665
Differential Revision: D17577143
Pulled By: VitalyFedyunin
fbshipit-source-id: 042f6385f9305bd66d50a8ce82e28f40a23a7266
