[PATCH] Back out "Move functional collectives implementation to python. (#98595) (#99168)
Summary:
Original commit changeset: ba36f8751adc
Original Phabricator Diff: D44788697
Test Plan: model loading is fine after reverting the diff
Reviewed By: zyan0, sayitmemory
Differential Revision: D44921259
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Fixes #ISSUE_NUMBER
Pull Request resolved: https://github.com/pytorch/pytorch/pull/99168
Approved by: https://github.com/izaitsevfb
