[Fix]Lift the NUSC_BOX_TO_CAM_BOX3D dependence on CUDA.

[LRJKD]

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Motivation

Lift the NUSC_BOX_TO_CAM_BOX3D dependence on CUDA.

Modification

Modified nuscenes_metric.py files.

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.

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (5c0613b) 46.70% compared to head (adce980) 46.70%.

Files	Patch %	Lines
mmdet3d/evaluation/metrics/nuscenes_metric.py	0.00%	3 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2851   +/-   ##
=======================================
  Coverage   46.70%   46.70%           
=======================================
  Files         277      277           
  Lines       23635    23635           
  Branches     3704     3704           
=======================================
  Hits        11039    11039           
  Misses      11892    11892           
  Partials      704      704           

Flag	Coverage Δ
unittests	46.70% <0.00%> (ø)

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[shun001]

/lgtm

[shun001]

Squash and merge

[shun001]

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