FRAME: Allow message ID to be mutated in ProcessMessage (#14183)

substrate/frame/message-queue/src/mock.rs

@@ -172,6 +172,7 @@ impl ProcessMessage for RecordingMessageProcessor {
 		message: &[u8],
 		origin: Self::Origin,
 		meter: &mut WeightMeter,
+		_id: &mut [u8; 32],
 	) -> Result<bool, ProcessMessageError> {
 		processing_message(message, &origin)?;
 
@@ -239,6 +240,7 @@ impl ProcessMessage for CountingMessageProcessor {
 		message: &[u8],
 		origin: Self::Origin,
 		meter: &mut WeightMeter,
+		_id: &mut [u8; 32],
 	) -> Result<bool, ProcessMessageError> {
 		if let Err(e) = processing_message(message, &origin) {
 			NumMessagesErrored::set(NumMessagesErrored::get() + 1);