SNOW-2208210 RHEL9 compatibility tests

[sfc-gh-lfedorczyk]

Add Rocky Linux 9 Testing to CI Pipeline

Description

This PR adds Rocky Linux 9 (RHEL 9 compatible) testing to the CI pipeline using a Docker-based approach. The tests run on ubuntu-latest runners inside a Rocky Linux 9 container, ensuring compatibility with enterprise Linux distributions.

Checklist

• Code compiles correctly
• Code is formatted according to Coding Conventions
• Created tests which fail without the change (if possible)
• All tests passing (dotnet test)
• Extended the README / documentation, if necessary
• Provide JIRA issue id (if possible) or GitHub issue id in PR name

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.40%. Comparing base (3117bed) to head (03b579d).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1304      +/-   ##
==========================================
+ Coverage   87.38%   87.40%   +0.02%     
==========================================
  Files         195      195              
  Lines       16278    16278              
  Branches     1690     1690              
==========================================
+ Hits        14224    14228       +4     
+ Misses       1610     1607       -3     
+ Partials      444      443       -1     

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[sfc-gh-daniszewski]

I left some minor stylistic comments, no one is really a must, so up to you :)
Tests looks good to me.

[sfc-gh-akolodziejczyk]

LGTM