register HeatmapMaxKeypoint with C10 (#25191)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/25191
registering as C10.
Test Plan: buck test mode/dev-nosan caffe2/caffe2/python/operator_test:heatmap_max_keypoint_op_test
Reviewed By: newstzpz
Differential Revision: D17056321
fbshipit-source-id: 989b72d7e3c9f23684b10d5fc9b98177ad4ee47b
