GitLab

* add the code of generating cam_sync_labels in waymo dataset

* fix key error in waymo converation

* fix waymo convert bug and refactor parse_ann_info in WaymoDataset

* add image_path key in waymo sweeps

* polish code

* add sweeps in data_prefix in waymo config

* fix some bugs in waymo

* resolve some comments and fix configs of pointpillars

* add 2 TODOs

* fix lint
Co-authored-by: lianqing <lianqing1997@gmail.com>