FIX: Refactor Move IT extension with ExtensionCommon

[Samuelopez-ansys]

Description

Refactoring of the Move IT extension with the new Extension Common class.

Add unit test of the UI.

Issue linked

Close #6273

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 85.27%. Comparing base (0aba0b3) to head (64fe82f).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6280      +/-   ##
==========================================
+ Coverage   85.25%   85.27%   +0.01%     
==========================================
  Files         173      173              
  Lines       65269    65358      +89     
==========================================
+ Hits        55647    55732      +85     
- Misses       9622     9626       +4     

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[SMoraisAnsys]

LGTM, thanks for handling the refactoring of this extension @Samuelopez-ansys
I left some minor comments to address before merging