* keypoint petr (#7774)

* petr train ok

train ok

refix augsize

affine size fix

update msdeformable

fix flip/affine

fix clip

add resize area

add distortion

debug mode

fix pos_inds

update edge joints

update word mistake

* delete extra codes;adapt transformer modify;update code format

* reverse old transformer modify

* integrate datasets

* add config and architecture for human36m (#7802)

* add config and architecture for human36m

* modify TinyPose3DHRNet to support human3.6M dataset

* delete useless class

---------
Co-authored-by: XYZ <1290573099@qq.com>

* update release 2.6 doc, test=document_fix

* update release/2.6 doc, test=document_fix

* Update README.md

* Update README_en.md

* Update README_en.md

test=document_fix

* Update Readme

* Update README_cn.md

* Update .gitignore

* Update README_cn.md

* Revert "Update .gitignore"

This reverts commit f26a86fe.

* update keypoint doc

* Update .gitignore

* Revert "Update .gitignore"

This reverts commit 44875dab.

* update keypoint readme

* Update README.md

* add complete deploy demo

* Update README_en.md

* Update README_en.md

del json config & preprocess

* add keypoint benchmark data

* update benchmark-data and change default keypoint bs=8, to be same as C++ infer

* update tinypose readme

* add tinypose link in keypoint introduction, test=document_fix

* fix naive-lite-hrnet backbone

* add WiderNaive-18 model

* add --save_prediction_only support for TopDown KeyPoint Metric

* add a use case for save_prediction_only

* merge upstream

* clean code

* add batch_size in keypoint_detector

* add document for keypoint dataset preparation

* test=document_fix

* test=document_fix

* 关键点文档中json示例格式化显示，test=document_fix

* add mot keypoint unite python infer

* fix mot pose fps

add dark deploy supported, mpii deploy supported;

add config dark_hrnet_w32_384x288.yml;
test=document_fix;

* add DarkPsoe support

* modify Top-Down bbox_file str to bbox.json