Use devicectl for getting information about connected devices

Currently we use the USB/IOKit functionality to get notified that iOS devices are connected/disconnected from the computer, and use the USB serial number for identification. (iosdevice.cpp)

The issue is that the USB serial number now is no longer necessarily exactly equal to the iOS device ID.

For iOS 17+ devices we can poll devicectl for information about devices. We should probably avoid polling all the time though, but we could

• Poll devicectl whenever we get a USB notification
• Poll with a long interval, and/or provide a manual "Detect" button for non-USB connections. That is a requirement for QTCREATORBUG-19510 which we probably can implement for devicectl managed devices.