testDocumentGenerator fetches endpoint and auth from config file

[jugal-chauhan]

Description

This change eliminates the need to manually provide endpoint and authentication details. The script now fetches these details from the migration-services.yaml file. It also leverages boto3 to obtain AWS session credentials from within the migration console, improving security and ease of use.

Testing

flake8
./gradlew test
./gradlew spotlessCheck
./gradlew spotlessApply

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.79%. Comparing base (a96eda1) to head (7bd5db2).
Report is 27 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1300      +/-   ##
============================================
+ Coverage     79.32%   79.79%   +0.46%     
- Complexity     3181     3231      +50     
============================================
  Files           438      440       +2     
  Lines         16400    17034     +634     
  Branches       1114     1153      +39     
============================================
+ Hits          13010    13592     +582     
- Misses         2712     2773      +61     
+ Partials        678      669       -9     

Flag	Coverage Δ
unittests	79.79% <ø> (+0.46%)	⬆️

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[lewijacn]

Thanks for changes