Back out "Revert D34524207: [pytorch][PR] remove _s_where" (#73579)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/73579
Original commit changeset: 87b1220d851c
Original Phabricator Diff: D34524207 (https://github.com/pytorch/pytorch/commit/4eb248256801103b08726bf5d85496641cebcdbb)
Test Plan: OSS tests
Reviewed By: malfet
Differential Revision: D34554432
fbshipit-source-id: 2f3601d3d4261ebcebb05b4b1aec0c9a8a00ea04
(cherry picked from commit b9cad3f2bc54e12b275567454336cf4d9dcb78c4)
