Add Matter SwitchBot K11+ fixture (home-assistant#154691)

Author: lboue

tests/components/matter/conftest.py

@@ -125,6 +125,7 @@ async def integration_fixture(
         "smoke_detector",
         "solar_inverter",
         "speaker",
+        "switchbot_k11_plus",
         "switch_unit",
         "tado_smart_radiator_thermostat_x",
         "temperature_sensor",