Only attempt to deploy to USB-connected iOS devices (#8309)

Do not attempt to deploy/debug wifi connected iOS devices. ios-deploy is
able to install over wifi, but we've had several bugs reporting failure
to run/debug once installation has completed when the device is also
connected via USB. Note that we don't currently support deploy/debug
over wifi since libimobiledevice (which is also required) requires a USB
connection.

packages/flutter_tools/lib/src/ios/devices.dart

@@ -244,6 +244,7 @@ class IOSDevice extends Device {
       id,
       '--bundle',
       bundle.path,
+      '--no-wifi',
       '--justlaunch',
     ];