remove Query method from CodeMonitorStore

Created by: camdencheek

This removes the Query method from CodeMonitorStore by replacing the last reference to it with the pre-existing store method MonitorByIDInt64

All the ownerByID is doing is fetching the of a monitor from the store, then checking the permissions, but it rolls its own SQL rather than leaving that to the store. Instead, this just fetches the whole monitor and returns the owner ID. Most places this is called, we can make this more efficient by just checking the ID of an already-fetched monitor, but that's a larger refactor than I want to tackle in this PR.