REFACTOR: General improvements in Icepak

[SMoraisAnsys]

Description

Follow up of #5695 applied to Icepak

Issue linked

Associated to #5504

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

Attention: Patch coverage is 7.14286% with 39 lines in your changes missing coverage. Please review.

Project coverage is 44.20%. Comparing base (3c863dc) to head (3a44ba1).

❌ Your patch check has failed because the patch coverage (7.14%) is below the target coverage (85.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #5728       +/-   ##
===========================================
- Coverage   85.20%   44.20%   -41.01%     
===========================================
  Files         156      156               
  Lines       61070    61051       -19     
===========================================
- Hits        52037    26989    -25048     
- Misses       9033    34062    +25029