Refactor: redesign AllPathsFromSourceToTarget

[samuelfac]

Related to #5164

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized it.
• All filenames are in PascalCase.
• All functions and variable names follow Java naming conventions.
• All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
• All new code is formatted with clang-format -i --style=file path/to/your/file.java

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 40.34%. Comparing base (8ea90fd) to head (655ca37).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #5224      +/-   ##
============================================
- Coverage     40.35%   40.34%   -0.02%     
+ Complexity     2486     2485       -1     
============================================
  Files           519      519              
  Lines         15479    15478       -1     
  Branches       2950     2949       -1     
============================================
- Hits           6247     6244       -3     
- Misses         8943     8944       +1     
- Partials        289      290       +1     

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