BUILD-8724 fix promote action

[julien-carsique-sonarsource]

BUILD-8724

Add promote-pull-request option for consistency with build actions
Add missing multi-repo, artifactory-deploy-repo, and artifactory-target-repo missing options for the respective MULTI_REPO_PROMOTE, ARTIFACTORY_DEPLOY_REPO, and ARTIFACTORY_TARGET_REPO environment parameters.

Update README according to BUILD-8686

Tested with:

• https://github.com/SonarSource/sonar-dummy/actions/runs/16652105679/job/47133379050?pr=470 (promote-pull-request unset - that's equivalent to false)
• https://github.com/SonarSource/sonar-dummy/actions/runs/16653982541/job/47134014146?pr=470 (promote-pull-request=true)

[sonarqubecloud]

🤖 Pull Request summary

Updates promote action to conditionally execute based on pull request deployment setting.

• Modified promote action behavior: Added promote-pull-request input (default: false) that controls whether promotion steps execute
• Changed build action defaults: Set deploy-pull-request to false for Gradle builds to align with Maven builds
• Enhanced promote action inputs: Added multi-repo, artifactory-deploy-repo, and artifactory-target-repo parameters for better configuration control
• Updated documentation: Expanded promote action docs with requirements, inputs, and usage examples; improved formatting throughout README

Review focus: The conditional execution logic in promote/action.yml uses if: ${{ inputs.promote-pull-request == 'true' }} on every step - ensure this doesn't break workflows when the input is false, and verify the environment variable assignments handle the conditional logic correctly.

💬 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