Implementation of GaussianMixtureMasksTransform

[snehilchatterjee]

Modified Components:

• lightly/transforms/__init__.py

New Files:

• lightly/transforms/gaussian_mixture_masks_transform.py
• tests/transforms/test_gaussian_mixture_masks.py

Enhancement:

• Added support for Gaussian Mixture Mask transform

Fixes Issue:

• Closes Add GaussianMixtureMask transform #1661

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.86%. Comparing base (56e669a) to head (0db5190).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1692      +/-   ##
==========================================
+ Coverage   84.78%   84.86%   +0.08%     
==========================================
  Files         154      155       +1     
  Lines        6479     6515      +36     
==========================================
+ Hits         5493     5529      +36     
  Misses        986      986              

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[SauravMaheshkar]

@snehilchatterjee, could you provide some input-output pairs?