Move groupbykey to grouping (#53122)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/53122
Test Plan: Imported from OSS
Reviewed By: glaringlee
Differential Revision: D26756641
Pulled By: ejguan
fbshipit-source-id: c4bc5864d841ce20c49446a03cfd195245b2be6e
