GHA-190 Refactor rule metadata summary generation and update PR creation step

[nils-werner-sonarsource]

This pull request refactors the summary generation and pull request creation steps in the update-rule-metadata/action.yml workflow. The changes improve the formatting and clarity of the rule metadata update summary, and switch to a custom action for creating pull requests.

Summary generation improvements:

• The summary is now written to a markdown file (rule-api-summary.md) as a table, providing clearer and more structured information about rules to update per Sonarpedia, including a total count.
• The summary output preserves newlines using GitHub Actions' multiline output syntax, ensuring proper formatting in the PR body.
• The previous step that replaced newlines with <br> tags for PR summary formatting has been removed, as the new approach handles formatting natively.

Pull request creation changes:

• The workflow now uses the custom SonarSource/release-github-actions/create-pull-request@v1 action instead of the generic peter-evans/create-pull-request, allowing for more tailored PR creation.
• The PR body now directly includes the improved summary output from the summary generation step.

Test

• Use action in analyzer project
• Ensure PR is created and pipeline is triggered

[hashicorp-vault-sonar-prod]

GHA-190

[sonarqubecloud]

SonarQube reviewer guide

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