Move ideep singleton registration to ATen from C2. (#18335)
Summary:
Since we are going to add ideep to ATen, and ATen is always compiled, it makes sense to have the registration in ATen rather than C2.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18335
Reviewed By: bddppq
Differential Revision: D14578652
Pulled By: gchanan
fbshipit-source-id: 4d77fcfc21a362b21d5291a127498aa722548873
