[Feature] Pick npu ops from master to 2.x

[ckirchhoff2021]

The PR is for merging npu ops from master to 2.x. I've constructed some unit-tests to test the op on my local machine, and the result looks good.

[codecov]

Codecov Report

Base: 66.34% // Head: 66.30% // Decreases project coverage by -0.04% ⚠️

Coverage data is based on head (98b291e) compared to base (78fdf17).
Patch coverage: 40.54% of modified lines in pull request are covered.

❗ Current head 98b291e differs from pull request most recent head ca99d17. Consider uploading reports for the commit ca99d17 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##              2.x    #2501      +/-   ##
==========================================
- Coverage   66.34%   66.30%   -0.05%     
==========================================
  Files         120      121       +1     
  Lines        7746     7926     +180     
  Branches     1074     1084      +10     
==========================================
+ Hits         5139     5255     +116     
- Misses       2438     2498      +60     
- Partials      169      173       +4     

Flag	Coverage Δ
unittests	66.30% <40.54%> (-0.05%)	⬇️

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

Impacted Files	Coverage Δ
mmcv/ops/focal_loss.py	25.00% <0.00%> (+1.36%)	⬆️
mmcv/ops/masked_conv.py	36.84% <0.00%> (-5.72%)	⬇️
mmcv/ops/modulated_deform_conv.py	65.18% <11.42%> (-15.14%)	⬇️
mmcv/ops/deform_conv.py	66.66% <20.00%> (-4.98%)	⬇️
mmcv/ops/bezier_align.py	74.46% <74.46%> (ø)
mmcv/ops/__init__.py	100.00% <100.00%> (ø)
mmcv/utils/__init__.py	100.00% <100.00%> (ø)
mmcv/utils/device_type.py	100.00% <100.00%> (ø)
mmcv/transforms/base.py	100.00% <0.00%> (ø)
mmcv/ops/active_rotated_filter.py	100.00% <0.00%> (ø)
... and 34 more

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[grimoire]

LGTM