Add Rotated ROI align op for pytorch (cpu&cuda), parrots (cpu&cuda) and onnxruntime (cpu)

[Johnson-Wang]

Awaiting steps.

• Add unittest for RoIAlignRotated

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

Merging #933 (bedc0df) into master (b5e1fac) will increase coverage by 0.25%.
The diff coverage is 83.78%.

❗ Current head bedc0df differs from pull request most recent head d228af5. Consider uploading reports for the commit d228af5 to get more accurate results

@@            Coverage Diff             @@
##           master     #933      +/-   ##
==========================================
+ Coverage   65.49%   65.74%   +0.25%     
==========================================
  Files         148      150       +2     
  Lines        9373     9518     +145     
  Branches     1704     1725      +21     
==========================================
+ Hits         6139     6258     +119     
- Misses       2915     2937      +22     
- Partials      319      323       +4     

Flag	Coverage Δ
unittests	65.74% <83.78%> (+0.25%)	⬆️

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

Impacted Files	Coverage Δ
mmcv/ops/box_iou_rotated.py	100.00% <ø> (ø)
mmcv/ops/deform_conv.py	61.76% <31.25%> (-4.36%)	⬇️
mmcv/runner/hooks/lr_updater.py	65.78% <75.00%> (+1.39%)	⬆️
mmcv/ops/roi_align_rotated.py	75.38% <75.38%> (ø)
mmcv/cnn/__init__.py	100.00% <100.00%> (ø)
mmcv/cnn/builder.py	100.00% <100.00%> (ø)
mmcv/cnn/utils/weight_init.py	91.89% <100.00%> (+0.22%)	⬆️
mmcv/ops/__init__.py	100.00% <100.00%> (ø)
mmcv/runner/base_module.py	79.41% <100.00%> (ø)
mmcv/utils/registry.py	98.33% <100.00%> (+0.86%)	⬆️
... and 3 more

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[ZwwWayne]

Please fix the CLA.

[luopeichao]

Parrots support is ready now.

[ZwwWayne]

Put it to the top of the file to be consistent with those inmmcv/ops/csrc/parrots/roi_align_rotated_cpu.cpp

[ZwwWayne]

Should this file recognize https://github.com/facebookresearch/detectron2/blob/master/detectron2/layers/csrc/ROIAlignRotated/ROIAlignRotated_cpu.cpp?