Pick MLU modifications from master (1.x) to main (2.x)

[defei-coder]

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

Sync mmcv2.x and mmcv1.x with MLU device ops PR.

Modification

Cherry-pick commit from master, The one ahead is PR title and the after is corresponding cimmit id,following commit be picked:

• [Feature] Support Voxelization with cambricon MLU device [Feature] Support Voxelization with cambricon MLU device #2500 ; 48ea88a
• [Enhance] Optimize the performace of ms_deform_attn for MLU device [Enhance] Optimize the performace of ms_deform_attn for MLU device #2510 ; fdc052e
• [Feature] Support ball_query with cambricon MLU backend and mlu-ops library. [Feature] Support ball_query with cambricon MLU backend and mlu-ops library. #2520 ; dfb0380
• [Docs] Steps to compile mmcv-full on MLU machine [Docs] Steps to compile mmcv-full on MLU machine #2571 ; 87768b7
• [Fix] Fix tensor descriptor setting in MLU ball_query. [Fix] Fix tensor descriptor setting in MLU ball_query. #2579 ; 46ea829
• [Feature] Add MLU support for Sparse Convolution op [Feature] Add MLU support for Sparse Convolution op #2589 ; 06fa328
• [Feature] Replace the implementation of deform_roi_pool with mlu-ops [Feature] Replace the implementation of deform_roi_pool with mlu-ops #2598 ; 9fcf48c
• [Feature] ms_deform_attn performance optimization [Feature] ms_deform_attn performance optimization #2616 ; 5f12229
• Support NmsRotated with cambricon MLU backend Support NmsRotated with cambricon MLU backend #2643 ; 0d1b224
• [Enhance] Add a default value for MMCV_MLU_ARGS [Enhance] Add a default value for MMCV_MLU_ARGS #2688 ; 66c5515
• [Enhance] Ignore mlu-ops files [Enhance] Ignore mlu-ops files #2691 ; 5f1d558

BC-breaking (Optional)

Does the modification introduce changes that break the backward-compatibility of the downstream repositories?
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

Before PR:

• I have read and followed the workflow indicated in the CONTRIBUTING.md to create this PR.
• Pre-commit or linting tools indicated in CONTRIBUTING.md are used to fix the potential lint issues.
• Bug fixes are covered by unit tests, the case that causes the bug should be added in the unit tests.
• New functionalities are covered by complete unit tests. If not, please add more unit test to ensure the correctness.
• The documentation has been modified accordingly, including docstring or example tutorials.

After PR:

• If the modification has potential influence on downstream or other related projects, this PR should be tested with some of those projects, like MMDet or MMCls.
• CLA has been signed and all committers have signed the CLA in this PR.

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.01 ⚠️

Comparison is base (1db3967) 65.39% compared to head (030643c) 65.38%.

❗ Current head 030643c differs from pull request most recent head a5aaabe. Consider uploading reports for the commit a5aaabe to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##              2.x    #2704      +/-   ##
==========================================
- Coverage   65.39%   65.38%   -0.01%     
==========================================
  Files         128      128              
  Lines        8538     8539       +1     
  Branches     1221     1222       +1     
==========================================
  Hits         5583     5583              
- Misses       2746     2747       +1     
  Partials      209      209              

Flag	Coverage Δ
unittests	65.38% <0.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
mmcv/ops/nms.py	63.68% <0.00%> (-0.36%)	⬇️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

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