Refactor test framework (#794)

This is in preparation for tests based on supporting features amongst
other tweaks:

- Consolidates the filtering logic that was split across `filter_model`
and `filter_fixture`
- Allows filtering `dev` fixture by `component`
- Consolidates fixtures missing method warnings into one warning
- Does not raise exceptions from `FakeSmartTransport` for missing
methods (required for KS240)

kasa/tests/fakeprotocol_iot.py

@@ -129,6 +129,7 @@ class FakeIotProtocol(IotProtocol):
                 config=DeviceConfig("127.0.0.123"),
             )
         )
+        info = copy.deepcopy(info)
         self.discovery_data = info
         self.writer = None
         self.reader = None