Add AffineTransformation

[ekagra-ranjan]

In reference to #569 added AffineTransformation to superseed LinearTransformation.

[codecov-io]

Codecov Report

Merging #792 into master will decrease coverage by 0.11%.
The diff coverage is 20%.

@@            Coverage Diff             @@
##           master     #792      +/-   ##
==========================================
- Coverage    38.1%   37.99%   -0.12%     
==========================================
  Files          32       32              
  Lines        3128     3148      +20     
  Branches      488      491       +3     
==========================================
+ Hits         1192     1196       +4     
- Misses       1857     1873      +16     
  Partials       79       79

Impacted Files	Coverage Δ
torchvision/transforms/transforms.py	80.58% <20%> (-2.84%)	⬇️

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[ekagra-ranjan]

Superseeded by #793