feat: Allow multiple versions of Gitlab

[ilijamt]

Currently, we only target:

• 16.x
• 17.x
• 18.x

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.85%. Comparing base (510a43d) to head (43a6f3b).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #182      +/-   ##
==========================================
- Coverage   95.94%   95.85%   -0.09%     
==========================================
  Files          27       25       -2     
  Lines        1947     1907      -40     
==========================================
- Hits         1868     1828      -40     
  Misses         56       56              
  Partials       23       23              

Flag	Coverage Δ
unittests	95.85% <100.00%> (-0.09%)	⬇️

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