Predefined version incrementer integration test

[bgalek]

This pull request introduces a new integration test suite for predefined version incrementers and refactors several existing integration tests to improve consistency and maintainability. It also updates the version incrementer logic to use new method names, and makes minor improvements to test setup.

[codecov]

Codecov Report

❌ Patch coverage is 28.57143% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 58.34%. Comparing base (9a89f48) to head (29624dd).

Files with missing lines	Patch %	Lines
...release/domain/PredefinedVersionIncrementer.groovy	28.57%	5 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #987      +/-   ##
============================================
- Coverage     59.53%   58.34%   -1.20%     
+ Complexity      428      425       -3     
============================================
  Files            83       83              
  Lines          1762     1762              
  Branches        145      145              
============================================
- Hits           1049     1028      -21     
- Misses          663      685      +22     
+ Partials         50       49       -1     

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