Upload test coverage reports to SonarCloud

[maciejwalkowiak]

At this moment we do not have test coverage reports in SonarCloud.

Links that may be helpful:

https://community.sonarsource.com/t/upload-jacocotestreport-data-to-sonarcloud-using-github-actions/38875 https://community.sonarsource.com/t/how-to-configure-upload-coverage-reports-to-sonarcloud-io/24618 https://community.sonarsource.com/t/coverage-test-data-importing-jacoco-coverage-report-in-xml-format/12151

How it's done in Spring Cloud GCP:

https://github.com/GoogleCloudPlatform/spring-cloud-gcp/blob/main/.github/workflows/sonar.yaml