ci: upgrading to ansys/actions v9 and securing action usage

[RobPasMue]

Description

Migrating to ansys/actions@v9.
Securing action usage in our workflows.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.38%. Comparing base (8f622d3) to head (9dbc891).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1895   +/-   ##
=======================================
  Coverage   90.38%   90.38%           
=======================================
  Files         105      105           
  Lines        9330     9330           
=======================================
  Hits         8433     8433           
  Misses        897      897           

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