FEAT: Circuit configuration extension refactoring

[Samuelopez-ansys]

Description

Migrate to new common class and implement unit test.

Issue linked

Close #6362

Checklist

• I have tested my changes locally.
• I have added necessary documentation or updated existing documentation.
• I have followed the coding style guidelines of this project.
• I have added appropriate tests (unit, integration, system).
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved by the PR if any.
• I have agreed with the Contributor License Agreement (CLA).

[ansys-reviewer-bot]

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[codecov]

Codecov Report

❌ Patch coverage is 94.25287% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.42%. Comparing base (2da9354) to head (02c8e0b).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6417      +/-   ##
==========================================
- Coverage   82.44%   82.42%   -0.03%     
==========================================
  Files         230      230              
  Lines       73686    73725      +39     
==========================================
+ Hits        60751    60768      +17     
- Misses      12935    12957      +22     

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[Samuelopez-ansys]

Hi @SMoraisAnsys @ecoussoux-ansys not sure if the unit tests are correctly implemented, please could you double check?