refactor: DBus interface includes bus instance

Updated `InterfaceRevpiConfig` to require a bus parameter, ensuring
proper initialization. Introduced a constructor in `DbusInterface` to
store the bus instance.

Signed-off-by: Sven Sager <s.sager@kunbus.com>

src/revpi_middleware/dbus_middleware1/process_image/interface_picontrol.py

@@ -26,7 +26,9 @@ class InterfacePiControl(DbusInterface):
 
     NotifyDriverReset = signal()
 
-    def __init__(self, picontrol_device: str, config_rsc: str):
+    def __init__(self, bus, picontrol_device: str, config_rsc: str):
+        super().__init__(bus)
+
         self.picontrol_device = picontrol_device
         self.config_rsc = config_rsc