OpInfo Ref: addbmm (#61832)
Summary:
See https://github.com/pytorch/pytorch/issues/54261. This PR:
* Adds reference wrapper using NumPy for reference function of `addbmm`
* Refines sample inputs (makes it more readable and avoids redundancy)
cc: mruberry
Pull Request resolved: https://github.com/pytorch/pytorch/pull/61832
Reviewed By: albanD
Differential Revision: D29816024
Pulled By: mruberry
fbshipit-source-id: e0fea6dc923504169a13bfaa258c61fbbc5fa9f4
