Implement sort for string in aten (#42398)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/42375
Pull Request resolved: https://github.com/pytorch/pytorch/pull/42398
Reviewed By: ailzhang
Differential Revision: D22884849
Pulled By: gmagogsfm
fbshipit-source-id: e53386949f0a5e166f3d1c2aa695294340bd1440
