Undo the workaround for Jobs Service with PostgreSQL

Quarkus reactive client has issue with GZip: https://github.com/quarkusio/quarkus/issues/8152

In the code of `PostgreSqlJobRepository`, workaround is applied to solve the issue: https://github.com/xieshenzh/kogito-apps/blob/14fe10a96fe1c8d1aa3650fa5d2d75c5732f869d/jobs-service/jobs-service-postgresql/src/main/java/org/kie/kogito/jobs/service/repository/postgresql/PostgreSqlJobRepository.java#L103

The workaround should be undone once the issue with Quarkus reactive client is fixed.