pytorch

d2f66083 - porting gather to ATen using TensorIterator with multithreading support. (#32425)

porting gather to ATen using TensorIterator with multithreading support. (#32425) Summary: Fixes [https://github.com/pytorch/pytorch/issues/24702](https://github.com/pytorch/pytorch/issues/24702). Pull Request resolved: https://github.com/pytorch/pytorch/pull/32425 Differential Revision: D19538265 Pulled By: ngimel fbshipit-source-id: 78821a16b6948916e956a04f984e0956f86cf582