sc-cli: add no-beefy flag to cli config (#14754)

Signed-off-by: Adrian Catangiu <adrian@parity.io>

substrate/client/cli/src/commands/run_cmd.rs

@@ -51,6 +51,10 @@ pub struct RunCmd {
 	#[arg(long)]
 	pub no_grandpa: bool,
 
+	/// Disable BEEFY voter when running in validator mode, otherwise disable the BEEFY observer.
+	#[arg(long)]
+	pub no_beefy: bool,
+
 	/// Listen to all RPC interfaces.
 	/// Default is local. Note: not all RPC methods are safe to be exposed publicly. Use an RPC
 	/// proxy server to filter out dangerous methods. More details:
@@ -313,6 +317,10 @@ impl CliConfiguration for RunCmd {
 		Ok(self.no_grandpa)
 	}
 
+	fn disable_beefy(&self) -> Result<bool> {
+		Ok(self.no_beefy)
+	}
+
 	fn rpc_max_connections(&self) -> Result<u32> {
 		Ok(self.rpc_max_connections)
 	}