pytorch

1280363b - Port `mean` kernel to structured kernels. (#61643)

Port `mean` kernel to structured kernels. (#61643) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/61643 Tracking issue: #55070 Test Plan: Imported from OSS Reviewed By: ejguan Differential Revision: D29783866 Pulled By: ezyang fbshipit-source-id: dc95baf593096c03fb5f292ee6c36de3cc7f2b35