added augmentation for hed

[Geeks-Sid]

Proposed Changes

• Added H&E based augmentations for Histopathology images (can be used for other RGB images)
• Solves #510

Checklist

• [x] I have read the CONTRIBUTING guide
• [x] My PR is based from the current GaNDLF master
• [x] Non-breaking change (does not break existing functionality): provide as many details as possible for any breaking change
• [x] Function/class source code documentation added/updated
• [x] Code has been blacked for style consistency
• [x] If applicable, version information has been updated in GANDLF/version.py
• [x] If adding a git submodule, add to list of exceptions for black styling in pyproject.toml file
• [ ] Usage documentation has been updated, if appropriate
• [x] History has been updated, if appropriate
• [x] Tests added or modified to cover the changes; if coverage is reduced, please give explanation
• [x] If customized dependency installation is required (i.e., a separate pip install step is needed for PR to be functional), please ensure it is reflected in all the files that control the CI, namely: python-test.yml, and all docker files [1,2,3,4]

[github-actions[bot]]

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[codecov[bot]]

Codecov Report

Merging #509 (9d545be) into master (f98bf01) will decrease coverage by 1.69%. The diff coverage is 22.89%.

@@            Coverage Diff             @@
##           master     #509      +/-   ##
==========================================
- Coverage   93.60%   91.91%   -1.70%     
==========================================
  Files         106      107       +1     
  Lines        6724     6886     +162     
==========================================
+ Hits         6294     6329      +35     
- Misses        430      557     +127     

Flag	Coverage Δ
unittests	91.91% <22.89%> (-1.70%)	:arrow_down:

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

Impacted Files	Coverage Δ
GANDLF/data/augmentation/rgb_augs.py	35.46% <18.97%> (-64.54%)	:arrow_down:
GANDLF/parseConfig.py	74.77% <20.00%> (-2.56%)	:arrow_down:
GANDLF/utils/exceptions.py	61.53% <61.53%> (ø)
GANDLF/data/augmentation/__init__.py	100.00% <100.00%> (ø)
...NDLF/data/preprocessing/template_matching/utils.py	97.67% <0.00%> (+2.32%)	:arrow_up:

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