centerformer coordinates correspondence of gt box length and width

[DezeZhao]

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.

Modification

mmdet3d coordinates are xyzlwhr, while in CenterFormer, l and w are opposite. This should be the same as mmdet3d coordinates.

Checklist

1. Pre-commit or other linting tools are used to fix the potential lint issues.
2. The modification is covered by complete unit tests. If not, please add more unit test to ensure the correctness.
3. If the modification has potential influence on downstream projects, this PR should be tested with downstream projects.
4. The documentation has been modified accordingly, like docstring or example tutorials.

[CLAassistant]

All committers have signed the CLA.

[JingweiZhang12]

We'll appreciate it if you can fix the same problem in CenterPoint

[codecov]

Codecov Report

Patch coverage: 58.80% and project coverage change: +0.49 🎉

Comparison is base (d84e081) 46.37% compared to head (05a6036) 46.86%.

❗ Current head 05a6036 differs from pull request most recent head 2bf94ff. Consider uploading reports for the commit 2bf94ff to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           dev-1.x    #2362      +/-   ##
===========================================
+ Coverage    46.37%   46.86%   +0.49%     
===========================================
  Files          259      267       +8     
  Lines        21390    22226     +836     
  Branches      3379     3486     +107     
===========================================
+ Hits          9919    10416     +497     
- Misses       10827    11146     +319     
- Partials       644      664      +20     

Flag	Coverage Δ
unittests	46.86% <58.80%> (+0.49%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
mmdet3d/datasets/s3dis_dataset.py	78.08% <ø> (ø)
mmdet3d/datasets/scannet_dataset.py	82.75% <ø> (ø)
mmdet3d/datasets/transforms/__init__.py	100.00% <ø> (ø)
mmdet3d/datasets/waymo_dataset.py	17.72% <ø> (ø)
mmdet3d/evaluation/__init__.py	100.00% <ø> (ø)
...tion/functional/waymo_utils/prediction_to_waymo.py	0.00% <0.00%> (ø)
mmdet3d/evaluation/metrics/instance_seg_metric.py	94.44% <ø> (ø)
mmdet3d/evaluation/metrics/seg_metric.py	62.50% <0.00%> (ø)
mmdet3d/evaluation/metrics/waymo_metric.py	8.11% <0.00%> (ø)
mmdet3d/models/dense_heads/centerpoint_head.py	21.77% <0.00%> (ø)
... and 57 more

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[DezeZhao]

We'll appreciate it if you can fix the same problem in CenterPoint

OK I will do it later.