[Feature] support MViT

[cir7]

[feat] support MViT
[feat] support uniform sample for SthV2 dataset in Class UniformSampleFrames, and move it from poseloading.py to loading.py
[feat] support random batch augment
[feat] support Random Erasing augment

[codecov]

Codecov Report

Base: 76.00% // Head: 75.47% // Decreases project coverage by -0.53% ⚠️

Coverage data is based on head (b3c9736) compared to base (a0863e9).
Patch coverage: 69.11% of modified lines in pull request are covered.

❗ Current head b3c9736 differs from pull request most recent head 6f78bac. Consider uploading reports for the commit 6f78bac to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           dev-1.x    #2007      +/-   ##
===========================================
- Coverage    76.00%   75.47%   -0.54%     
===========================================
  Files          137      140       +3     
  Lines         9918    10445     +527     
  Branches      1626     1713      +87     
===========================================
+ Hits          7538     7883     +345     
- Misses        2029     2178     +149     
- Partials       351      384      +33     

Flag	Coverage Δ
unittests	75.47% <69.11%> (-0.54%)	⬇️

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

Impacted Files	Coverage Δ
mmaction/datasets/transforms/__init__.py	100.00% <ø> (ø)
mmaction/datasets/transforms/pose_loading.py	93.27% <ø> (-1.50%)	⬇️
mmaction/models/recognizers/recognizer3d.py	67.85% <10.00%> (-7.66%)	⬇️
mmaction/datasets/transforms/processing.py	82.04% <16.43%> (-6.95%)	⬇️
mmaction/models/utils/embed.py	40.50% <40.50%> (ø)
mmaction/datasets/transforms/loading.py	84.24% <83.52%> (-0.09%)	⬇️
mmaction/models/backbones/mvit.py	84.06% <84.06%> (ø)
mmaction/models/utils/blending_utils.py	94.44% <84.61%> (-4.00%)	⬇️
mmaction/models/heads/mvit_head.py	89.28% <89.28%> (ø)
mmaction/models/backbones/__init__.py	100.00% <100.00%> (ø)
... and 2 more

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 at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.