FIX: Parametrics fix in add_from_file for Maxwell

[gmalinve]

Description

The method has a different implementation for Maxwell2D and Maxwell3D.

Issue linked

Please mention the issue number or describe the problem this pull request addresses.

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.
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.28%. Comparing base (e54714f) to head (c287fdd).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6299      +/-   ##
==========================================
- Coverage   85.29%   85.28%   -0.02%     
==========================================
  Files         173      173              
  Lines       65331    65308      -23     
==========================================
- Hits        55724    55696      -28     
- Misses       9607     9612       +5     

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[MaxJPRey]

LGTM.

[SMoraisAnsys]

LGTM, I left a minor comment, feel free to discard it :)