Kernel/USB: Get all interface descriptors on enumeration

This creates all interfaces when the device is enumerated, with a link
to the configuration that it is a part of. As such, a new class,
`USBInterface` has been introduced to express this state.

Kernel/Bus/USB/USBDevice.cpp

@@ -132,6 +132,7 @@ ErrorOr<void> Device::enumerate_device()
         }
 
         USBConfiguration device_configuration(*this, configuration_descriptor);
+        TRY(device_configuration.get_interfaces());
         m_configurations.append(device_configuration);
     }