Add random_erasing layer

[shashaka]

I have implemented the RandomErasing image processing feature. Please let me know if any further corrections or improvements are required.

here is my gist

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 83.33333% with 21 lines in your changes missing coverage. Please review.

Project coverage is 82.01%. Comparing base (5df8fb9) to head (fce9c0c).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
...reprocessing/image_preprocessing/random_erasing.py	82.92%	13 Missing and 8 partials ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           master   #20798    +/-   ##
========================================
  Coverage   82.01%   82.01%            
========================================
  Files         557      558     +1     
  Lines       52014    52145   +131     
  Branches     8037     8054    +17     
========================================
+ Hits        42657    42769   +112     
- Misses       7403     7415    +12     
- Partials     1954     1961     +7     

Flag	Coverage Δ
keras	81.83% <81.74%> (+<0.01%)	⬆️
keras-jax	64.27% <77.77%> (+0.05%)	⬆️
keras-numpy	59.00% <72.22%> (+0.04%)	⬆️
keras-openvino	29.86% <17.46%> (-0.04%)	⬇️
keras-tensorflow	64.82% <77.77%> (+0.03%)	⬆️
keras-torch	64.20% <77.77%> (+0.02%)	⬆️

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[fchollet]

Very nice, thank you for the PR!

[shashaka]

@fchollet
I have updated the source code based on your guidance. Please let me know if any further corrections are needed.

[fchollet]

LGTM, thank you for the contribution! 👍