add cpp wrapper for QVE
add cpp wrapper for QVE

Summary:
Pull Request resolved: https://github.com/facebookresearch/detectron2/pull/3525

Add c++ wrapper for instance segmentation

Reviewed By: zhanghang1989

Differential Revision: D31049697

fbshipit-source-id: 37db567468d1a72f73d3f8834684895e18666f0b

facebookresearch/detectron2,facebookresearch/detectron2,facebookresearch/detectron2