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 23.35%. Comparing base (50a9a60) to head (8b2ca4e).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #7035       +/-   ##
===========================================
- Coverage   83.60%   23.35%   -60.25%     
===========================================
  Files         253      252        -1     
  Lines       77247    77168       -79     
===========================================
- Hits        64585    18026    -46559     
- Misses      12662    59142    +46480     

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