Making norms inputs independent (#68526)
Summary:
An update to https://github.com/pytorch/pytorch/issues/67442 to make sure all of the inputs produced are independent
Updates group_norm and instance_norm (local_response_norm was already producing independent inputs)
Also updates instance_norm for a bug in one set of inputs
Pull Request resolved: https://github.com/pytorch/pytorch/pull/68526
Reviewed By: ngimel
Differential Revision: D32532076
Pulled By: samdow
fbshipit-source-id: 45b9320fd9aecead052b21f838f95887cfb71821
