Fix test framework running against real devices (#1235)

kasa/device.py

@@ -320,6 +320,11 @@ class Device(ABC):
     def model(self) -> str:
         """Returns the device model."""
 
+    @property
+    @abstractmethod
+    def _model_region(self) -> str:
+        """Return device full model name and region."""
+
     @property
     @abstractmethod
     def alias(self) -> str | None: