[JENKINS-72059] Add new quality gate options to alter the stage only

[uhafner]

As requested in JENKINS-72059 it makes sense to publish the quality gate results as a status for a step without touching the overall build status.

Downstream PRs:

• [JENKINS-72059] Add new quality gate options to alter the stage only coverage-plugin#52
• [JENKINS-72059] Add new quality gate options to alter the stage only warnings-ng-plugin#1649

[codecov]

Codecov Report

Attention: Patch coverage is 51.25000% with 39 lines in your changes are missing coverage. Please review.

Project coverage is 40.49%. Comparing base (358ef35) to head (ad0273a).
Report is 17 commits behind head on main.

❗ Current head ad0273a differs from pull request most recent head afb0e59. Consider uploading reports for the commit afb0e59 to get more accurate results

Files	Patch %	Lines
...main/java/io/jenkins/plugins/util/QualityGate.java	0.00%	18 Missing ⚠️
...ava/io/jenkins/plugins/util/QualityGateResult.java	27.27%	16 Missing ⚠️
...ava/io/jenkins/plugins/util/NullResultHandler.java	0.00%	3 Missing ⚠️
...ava/io/jenkins/plugins/util/AbstractExecution.java	0.00%	2 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##               main     #309       +/-   ##
=============================================
+ Coverage     30.00%   40.49%   +10.49%     
- Complexity       64       97       +33     
=============================================
  Files            20       21        +1     
  Lines           460      526       +66     
  Branches         41       44        +3     
=============================================
+ Hits            138      213       +75     
+ Misses          319      309       -10     
- Partials          3        4        +1     

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