p2p: do not format raw msg bytes

While debugging the mempool issue (#5796), I've noticed we're spending
quite a bit of time encoding blobs of data, which never get printed! The
reason is filtering occurs on the level below, so Go runtime rightfully
evaluates function arguments.

I think it's okay to not format raw bytes.

rpc/jsonrpc/client/ws_client.go

@@ -511,7 +511,7 @@ func (c *WSClient) readRoutine() {
 		// c.wg.Wait() in c.Stop(). Note we rely on Quit being closed so that it sends unlimited Quit signals to stop
 		// both readRoutine and writeRoutine
 
-		c.Logger.Info("got response", "id", response.ID, "result", fmt.Sprintf("%X", response.Result))
+		c.Logger.Info("got response", "id", response.ID, "result", response.Result)
 
 		select {
 		case <-c.Quit():