Expose normalization parameters

[AndresAlgaba]

What does this PR do?

This PR exposes the normalization parameters of torchvision.transforms.Normalize as transform_kwargs in the ImageClassificationInputTransform.

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[codecov]

Codecov Report

Merging #1178 (f74f99e) into master (69dee81) will decrease coverage by 9.89%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1178      +/-   ##
==========================================
- Coverage   90.92%   81.03%   -9.90%     
==========================================
  Files         283      283              
  Lines       12699    12701       +2     
==========================================
- Hits        11547    10292    -1255     
- Misses       1152     2409    +1257     

Flag	Coverage Δ
unittests	81.03% <100.00%> (-9.90%)	⬇️

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

Impacted Files	Coverage Δ
flash/image/classification/input_transform.py	81.25% <100.00%> (-2.09%)	⬇️
flash/core/integrations/icevision/transforms.py	18.24% <0.00%> (-75.00%)	⬇️
...lash/image/embedding/vissl/transforms/multicrop.py	27.27% <0.00%> (-69.70%)	⬇️
flash/core/integrations/icevision/data.py	28.88% <0.00%> (-66.67%)	⬇️
flash/image/embedding/heads/vissl_heads.py	36.36% <0.00%> (-63.64%)	⬇️
flash/image/detection/input.py	36.66% <0.00%> (-63.34%)	⬇️
...ash/image/classification/integrations/baal/loop.py	32.08% <0.00%> (-62.69%)	⬇️
flash/core/integrations/icevision/backbones.py	33.33% <0.00%> (-60.01%)	⬇️
...ash/image/classification/integrations/baal/data.py	34.34% <0.00%> (-59.60%)	⬇️
...age/face_detection/backbones/fastface_backbones.py	42.10% <0.00%> (-57.90%)	⬇️
... and 66 more

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[ethanwharris]

Nice! LGTM 😃