Add method to sc-cli to reset the SIGPIPE signal handler (#5447)

The signal handler will be reset to the default system one. This means
the program will be exited instead of panicking. This is required to
support piping in the console.

substrate/bin/node/cli/src/command.rs

@@ -25,6 +25,8 @@ where
 	I: Iterator<Item = T>,
 	T: Into<std::ffi::OsString> + Clone,
 {
+	sc_cli::reset_signal_pipe_handler()?;
+
 	let args: Vec<_> = args.collect();
 	let opt = sc_cli::from_iter::<Cli, _>(args.clone(), &version);