FIX: Apply value to derivative variable

[Samuelopez-ansys]

Description

Set tuning offset was not setting the value of the variable correctly

Issue linked

#5497

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 84.70%. Comparing base (1e04243) to head (a22aef9).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5499      +/-   ##
==========================================
+ Coverage   80.76%   84.70%   +3.94%     
==========================================
  Files         143      143              
  Lines       60118    60116       -2     
==========================================
+ Hits        48557    50924    +2367     
+ Misses      11561     9192    -2369     

[SMoraisAnsys]

LGTM, I left minor comments.
The two methods set_tuning_offset seem to be the exact same code. We should really think about refactoring a bit the code to avoid code duplicates.
Do we have an issue to track all those duplicates and see if we can't come up with new classes encapsulating all those duplicates ?

[Samuelopez-ansys]

I agree regarding the duplicities. In this case this method can be used only for SetupHFSS and SetupAuto, but not for the others, so we can add it to Setup class, and internally check if the Setups are of one of these 2 types. We can do It in another PR.