refactor(add privateuseone floder in aten/src/ATen): add a PrivateUse… (#98127)
Add a PrivateUse1 folder to contain all the feature adaptations for PrivateUse1 under Aten,For example GetGeneratorPrivate which is used for the three-party backend to register his own Generator implementation.This makes it easier for us to centrally manage these features, and it will increase the convenience of adaptation for different back-end manufacturers. For more info: https://github.com/pytorch/pytorch/issues/98073
Pull Request resolved: https://github.com/pytorch/pytorch/pull/98127
Approved by: https://github.com/bdhirsh
