Port upgrade services and workers to CE

I think there needs to be a 2nd issue to port service and worker level code, but in a generic way :

• ee/app/services/clusters/applications/check_upgrade_progress_service.rb
• ee/app/workers/cluster_wait_for_app_update_worker.rb
• ee/app/models/ee/clusters/applications/prometheus.rb but generalise to all applications !

But not ⚔ ee/app/services/clusters/applications/prometheus_update_service.rb