[ModelCenter]PaddleDetection's review(PP-YOLO, PP-YOLOv2, PP-YOLOE, PP-YOLOE+, PP-Vehicle, PP-HumanV2, PP-Picodet, PP-TinyPose) (#5606)

* PaddleDetection's review by yezj

* Update info.yaml

* Update info.yaml

* Update info.yaml

* Update info.yaml

* Update info.yaml

* Update info.yaml

* Update info.yaml

* Update info.yaml

* delete redundancy files

* delete redundancy files of pp-tinypose

* fix introduction of detection models

* add ppyolov2 infer result

* fix PP-YOLOE+ intro

* test = add the PP-YOLOv2 Demo to ModerCenter

* test = update the PP-YOLOv2 Demo to ModerCenter

* test = update the PP-YOLOv2 Demo to ModerCenter

* test = add the folders for related models
Co-authored-by: NYang <yangyehua@baidu.com>