Add DB to quarkus sample app for DevOps tests

[SchettlerKoehler]

[SchettlerKoehler]

Please add DB support to https://github.com/devonfw-sample/devon4quarkus-cicd-testapp-service-b. This should be done on a branch to have a version with and a version without DB.

[HKayed]

PR link: devonfw-sample/devon4quarkus-cicd-testapp-service-b#2