BUILD-8830 disable sonar scans for build-gradle option

[mikolaj-matuszny-ext-sonarsource]

BUILD-8830

[sonarqubecloud]

🤖 Pull Request summary

Updates Gradle build action to support skipping SonarQube analysis.

• Added 'none' option to sonar-platform parameter to disable SonarQube scans entirely
• Modified environment validation to skip SonarQube credentials when platform is 'none'
• Refactored git fetch logic to skip unshallow fetch when Sonar analysis is disabled
• Updated gradle_build() to bypass orchestrator and call build directly for 'none' platform
• Added comprehensive test coverage for the new skip-sonar functionality

Review focus: Verify the conditional logic properly handles all code paths when sonar-platform='none', especially around environment validation and the orchestrator bypass.

💬 Please send your feedback

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[mikolaj-matuszny-ext-sonarsource]

Test run - https://github.com/SonarSource/sonar-dummy-gradle-oss/actions/runs/17824043469/job/50675656118?pr=288

[emma-patterson-sonarsource]

@mikolaj-matuszny-ext-sonarsource
Just wondering if we can make use of a choice here:
https://docs.github.com/en/actions/reference/workflows-and-actions/workflow-syntax#example-of-onworkflow_dispatchinputs

[mikolaj-matuszny-ext-sonarsource]

This is a general action and on: workflow_dispatch is how you execute it.
In your project you can define such input options which you can select when manually triggering the workflow. Then you can pass this input to you action call.
It's not an option in action definition which is what's we're creating here.