[Feature] Add task_modules type hint

[A-new-b]

Motivation

Add task_modules type hint to the code and make it more readable.

Modification

add type hints to mmdet3d/model/task_modules

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

Patch coverage: 100.00% and project coverage change: +0.10 🎉

Comparison is base (6299a1f) 46.92% compared to head (9365e9b) 47.02%.

❗ Current head 9365e9b differs from pull request most recent head 8617a01. Consider uploading reports for the commit 8617a01 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           dev-1.x    #2485      +/-   ##
===========================================
+ Coverage    46.92%   47.02%   +0.10%     
===========================================
  Files          277      277              
  Lines        23235    23280      +45     
  Branches      3622     3622              
===========================================
+ Hits         10903    10948      +45     
  Misses       11641    11641              
  Partials       691      691              

Flag	Coverage Δ
unittests	47.02% <100.00%> (+0.10%)	⬆️

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

Impacted Files	Coverage Δ
...det3d/models/task_modules/samplers/pseudosample.py	90.47% <ø> (ø)
.../models/task_modules/anchor/anchor_3d_generator.py	94.40% <100.00%> (+0.16%)	⬆️
mmdet3d/models/task_modules/anchor/builder.py	66.66% <100.00%> (+6.66%)	⬆️
...dels/task_modules/assigners/max_3d_iou_assigner.py	52.08% <100.00%> (ø)
mmdet3d/models/task_modules/builder.py	75.00% <100.00%> (+3.57%)	⬆️
...dels/task_modules/coders/anchor_free_bbox_coder.py	91.07% <100.00%> (+0.50%)	⬆️
...els/task_modules/coders/centerpoint_bbox_coders.py	84.61% <100.00%> (+0.34%)	⬆️
...ls/task_modules/coders/delta_xyzwhlr_bbox_coder.py	86.27% <100.00%> (+0.85%)	⬆️
...3d/models/task_modules/coders/fcos3d_bbox_coder.py	94.33% <100.00%> (+0.33%)	⬆️
...dels/task_modules/coders/groupfree3d_bbox_coder.py	20.00% <100.00%> (+3.33%)	⬆️
... and 7 more

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[JingweiZhang12]

Thanks for your PR. Please review this PR. @Xiangxu-0103

[Xiangxu-0103]

Hi @A-new-b , please update this PR according to the comments and fix the lint issue.

[A-new-b]

Hi @A-new-b , please update this PR according to the comments and fix the lint issue.

thanks for your reminder, I have fixed the lint