pytorch

d0dab772 - [BE][optim] Remove objects from being globals and comment to clarify (#100899)

[BE][optim] Remove objects from being globals and comment to clarify (#100899) What happened in this PR? 1. Added comments to clarify rosenbrock 2. Moved global objects to be within classes for better readability/grouping 3. Renamed dnn to cnn for consistency This is the very first of the cleanup of test_optim.py Pull Request resolved: https://github.com/pytorch/pytorch/pull/100899 Approved by: https://github.com/albanD, https://github.com/Skylion007