De-duplicate sonar job in the CI (#1238)

* De-duplicate sonar job in the CI

* Remove workaround for `src/*/kotlin` folders

* Downgrade the sonarqube plugin version

* Try increasing workers for this job, since it's quite slow

* Warn about regression in latest sonarqube release

* Forbid backups to prevent cryptographic issues

.github/workflows/quality.yml

@@ -52,12 +52,6 @@ jobs:
           name: linting-report
           path: |
             */build/reports/**/*.*
-      - name: 🔊 Publish results to Sonar
-        env:
-          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
-          ORG_GRADLE_PROJECT_SONAR_LOGIN: ${{ secrets.SONAR_TOKEN }}
-        if: ${{ always() && env.SONAR_TOKEN != '' && env.ORG_GRADLE_PROJECT_SONAR_LOGIN != '' }}
-        run: ./gradlew sonar $CI_GRADLE_ARG_PROPERTIES
       - name: Prepare Danger
         if: always()
         run: |