CI: Add Testmon cache restoration for test selective run

[eblanco-ansys]

Description

Draft for testmon implementation

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 21.78%. Comparing base (d620e47) to head (12494e0).

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #7035       +/-   ##
===========================================
- Coverage   83.48%   21.78%   -61.71%     
===========================================
  Files         253      252        -1     
  Lines       77721    77642       -79     
===========================================
- Hits        64887    16915    -47972     
- Misses      12834    60727    +47893     

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