FIX: Arbitrary waveport extension driven terminal mode fix

[svandenb-dev]

Description

This PR fix the bug with extension for arbitrary wave port generation be enabling HFSS driven terminal instead of modal.

closing #5736

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.
• I have agreed with the Contributor License Agreement (CLA).

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.18%. Comparing base (b484a4b) to head (0ca6012).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5737      +/-   ##
==========================================
+ Coverage   81.48%   85.18%   +3.69%     
==========================================
  Files         156      156              
  Lines       61063    61063              
==========================================
+ Hits        49760    52018    +2258     
+ Misses      11303     9045    -2258     

[MaxJPRey]

LGTM.