[Feature] Add the code of generating cam_sync_labels on waymo dataset

[lianqing11]

Thanks for your contribution and we appreciate it a lot. The following instructions would make your pull request more healthy and more easily get feedback. If you do not understand some items, don't worry, just make the pull request and seek help from maintainers.

Motivation

Please describe the motivation of this PR and the goal you want to achieve through this PR.

Modification

Add the code of generating cam_sync_labels on waymo dataset. It is used for cam only 3d object detection on the waymo dataset.

BC-breaking (Optional)

Use cases (Optional)

Checklist

[Xiangxu-0103]

Hi, I think the code here should be modified with update_pkl_infos('waymo', out_dir=out_dir, pkl_path=info_train_path) and the same as below.

[lianqing11]

Hi, I think the code here should be modified with update_pkl_infos('waymo', out_dir=out_dir, pkl_path=info_train_path) and the same as below.

Yes, it should be modified to Waymo. Updated in #1892.