[test]test unittest on CI

[guyang3532]

Remove the filter branch limits for unittest_win_gpu and unittest_linux_gpu in #2328 and test for it.
don't merge

[codecov]

Codecov Report

Merging #2332 into master will increase coverage by 65.32%.
The diff coverage is 80.56%.

@@             Coverage Diff             @@
##           master    #2332       +/-   ##
===========================================
+ Coverage    0.42%   65.75%   +65.32%     
===========================================
  Files          92       93        +1     
  Lines        7448     7657      +209     
  Branches     1138     1157       +19     
===========================================
+ Hits           32     5035     +5003     
+ Misses       7408     2281     -5127     
- Partials        8      341      +333     

Impacted Files	Coverage Δ
torchvision/datasets/ucf101.py	27.08% <0.00%> (+27.08%)	⬆️
torchvision/datasets/usps.py	30.30% <0.00%> (+30.30%)	⬆️
torchvision/io/_video_opt.py	21.25% <ø> (+4.58%)	⬆️
torchvision/models/detection/image_list.py	80.00% <ø> (+80.00%)	⬆️
torchvision/ops/feature_pyramid_network.py	75.82% <ø> (+75.82%)	⬆️
torchvision/ops/poolers.py	85.14% <0.00%> (+85.14%)	⬆️
torchvision/ops/boxes.py	71.73% <28.57%> (+71.73%)	⬆️
torchvision/models/detection/roi_heads.py	77.23% <63.63%> (+77.23%)	⬆️
torchvision/models/detection/_utils.py	67.34% <66.66%> (+67.34%)	⬆️
torchvision/transforms/functional_tensor.py	65.83% <68.62%> (+65.83%)	⬆️
... and 111 more

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