Provide checkpoints of re-trained DETR3D model

[ZLTJohn]

All three configs have been trained and the correctness between old mmdet3d and new mmdet3d is tolerable.
Logs files and model checkpoints is available at Baidu Netdisk:

Link: https://pan.baidu.com/s/13XlTxPSeRK21ls9EH28sow
Password：1ydk

[codecov]

Codecov Report

Base: 47.09% // Head: 47.09% // No change to project coverage 👍

Coverage data is based on head (85aadad) compared to base (92b24d9).
Patch has no changes to coverable lines.

❗ Current head 85aadad differs from pull request most recent head c08f5d3. Consider uploading reports for the commit c08f5d3 to get more accurate results

Additional details and impacted files

@@           Coverage Diff            @@
##           dev-1.x    #2279   +/-   ##
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  Coverage    47.09%   47.09%           
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  Files          261      261           
  Lines        21679    21679           
  Branches      3425     3425           
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  Hits         10210    10210           
  Misses       10816    10816           
  Partials       653      653           

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[JingweiZhang12]

Note that the PR of refactoring DETR-series has been merged in the latest MMDet and there are some BC breaking about DETRHead. open-mmlab/mmdetection#8763
Please restrict the version of mmdet <= V3.0.0rc5 in README.md and describe this situation.
Or, we'll very appreciate it if you can refactor the DETR3D to be compatible with the latest MMDet.

[JingweiZhang12]

Please pull the latest MMDet3D.

[JingweiZhang12]

This PR will be merged after the link of models and logs have been updated.

[JingweiZhang12]

The checkpoints and logs have been uploaded to the cloud. The link format in the readme:
https://download.openmmlab.com/mmdetection3d/v1.1.0_models/detr3d/${FILE_NAME}

[JingweiZhang12]

@ZLTJohn Please pull the latest code and resolve the conflicts.

[ZLTJohn]

Already pulled the latest code and resolved the conflicts.