Fix order of measured quantities
Issue: https://codebase.helmholtz.cloud/hub-terra/sms/service-desk/-/issues/23
This MR uses the backend from backend!454 (merged), so that it introduces the created_at field for device properties.
Having this we can easily query the device properties sorted. And as the copy function will send the requests for adding a new device property one after another, we will keep the very same ordering.