[numpy] torch.{all/any} : output dtype is always bool (#47878)
Summary:
BC-breaking note:
This PR changes the behavior of the any and all functions to always return a bool tensor. Previously these functions were only defined on bool and uint8 tensors, and when called on uint8 tensors they would also return a uint8 tensor. (When called on a bool tensor they would return a bool tensor.)
PR summary:
https://github.com/pytorch/pytorch/pull/44790#issuecomment-725596687
Fixes 2 and 3
Also Fixes https://github.com/pytorch/pytorch/issues/48352
Changes
* Output dtype is always `bool` (consistent with numpy) **BC Breaking (Previously used to match the input dtype**)
* Uses vectorized version for all dtypes on CPU
* Enables test for complex
* Update doc for `torch.all` and `torch.any`
TODO
* [x] Update docs
* [x] Benchmark
* [x] Raise issue on XLA
Pull Request resolved: https://github.com/pytorch/pytorch/pull/47878
Reviewed By: albanD
Differential Revision: D25714324
Pulled By: mruberry
fbshipit-source-id: a87345f725297524242d69402dfe53060521ea5d
