ci: simplify vulnerabilities check

[RobPasMue]

Description

Simplify workflow call based on conditional evaluation. Thanks to @germa89 and @clatapie for trying this out on ansys/pymapdl#3505

Issue linked

None

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 unit tests.
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved to the PR if any.
• I have assigned this PR to myself.
• I have added the minimum version decorator to any new backend method implemented.
• I have made sure that the title of my PR follows Conventional commits style (e.g. feat: extrude circle to cylinder)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.78%. Comparing base (618a92f) to head (6203595).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1504   +/-   ##
=======================================
  Coverage   91.78%   91.78%           
=======================================
  Files          86       86           
  Lines        6974     6974           
=======================================
  Hits         6401     6401           
  Misses        573      573           

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