[Feature] Add TPVFormer Projects

[sunjiahao1999]

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

Please briefly describe what modification is made in this PR.

BC-breaking (Optional)

Does the modification introduce changes that break the back-compatibility of the downstream repos?
If so, please describe how it breaks the compatibility and how the downstream projects should modify their code to keep compatibility with this PR.

Use cases (Optional)

If this PR introduces a new feature, it is better to list some use cases here, and update the documentation.

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.

[codecov]

Codecov Report

Patch coverage: 18.24% and project coverage change: -0.12 ⚠️

Comparison is base (260860a) 47.12% compared to head (b934f20) 47.01%.

❗ Current head b934f20 differs from pull request most recent head 5fbf125. Consider uploading reports for the commit 5fbf125 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           dev-1.x    #2399      +/-   ##
===========================================
- Coverage    47.12%   47.01%   -0.12%     
===========================================
  Files          276      276              
  Lines        23009    23106      +97     
  Branches      3581     3602      +21     
===========================================
+ Hits         10844    10863      +19     
- Misses       11483    11557      +74     
- Partials       682      686       +4     

Flag	Coverage Δ
unittests	47.01% <18.24%> (-0.12%)	⬇️

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

Impacted Files	Coverage Δ
mmdet3d/apis/inference.py	13.63% <0.00%> (-0.83%)	⬇️
mmdet3d/datasets/convert_utils.py	0.00% <ø> (ø)
mmdet3d/datasets/transforms/loading.py	44.91% <0.00%> (ø)
mmdet3d/datasets/transforms/transforms_3d.py	40.09% <0.00%> (ø)
mmdet3d/evaluation/metrics/kitti_metric.py	9.09% <ø> (ø)
mmdet3d/evaluation/metrics/waymo_metric.py	8.11% <ø> (ø)
mmdet3d/models/decode_heads/cylinder3d_head.py	51.35% <ø> (ø)
mmdet3d/models/decode_heads/minkunet_head.py	50.00% <0.00%> (ø)
mmdet3d/utils/setup_env.py	81.81% <ø> (ø)
...t3d/models/data_preprocessors/data_preprocessor.py	31.46% <9.09%> (+0.16%)	⬆️
... and 5 more

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.