FIX: Remove static oDesktop string from add_pyaedt_to_aedt calls in installer script

[eblanco-ansys]

Description

Reverted how installation script displays log messages for panels. run_pyinstaller_from_c_python method was uncorrectly implemented, passing an static "odesktop" string to add_pyaedt_to_aedt. This leaded to an error

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).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.48%. Comparing base (f14d309) to head (042bc2f).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6864      +/-   ##
==========================================
+ Coverage   81.53%   83.48%   +1.95%     
==========================================
  Files         245      245              
  Lines       77614    77614              
==========================================
+ Hits        63284    64798    +1514     
+ Misses      14330    12816    -1514     

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[SMoraisAnsys]

AFAIK this won't work for the same reasons as the one that had to be handled in #6803 (comment), aka communicate() raises an exception in Linux. Can you ensure that it works before passing the PR as ready to be reviewed ?