Migrate validator client to clap derive (#6300)

Partially #5900


  Migrate the validator client cli to clap derive

account_manager/src/wallet/mod.rs

@@ -4,7 +4,6 @@ pub mod recover;
 
 use crate::WALLETS_DIR_FLAG;
 use clap::{Arg, ArgAction, ArgMatches, Command};
-use clap_utils::FLAG_HEADER;
 use directory::{parse_path_or_default_with_flag, DEFAULT_WALLET_DIR};
 use std::fs::create_dir_all;
 use std::path::PathBuf;
@@ -15,16 +14,6 @@ pub fn cli_app() -> Command {
     Command::new(CMD)
         .about("Manage wallets, from which validator keys can be derived.")
         .display_order(0)
-        .arg(
-            Arg::new("help")
-            .long("help")
-            .short('h')
-            .help("Prints help information")
-            .action(ArgAction::HelpLong)
-            .display_order(0)
-            .help_heading(FLAG_HEADER)
-            .global(true)
-        )
         .arg(
             Arg::new(WALLETS_DIR_FLAG)
                 .long(WALLETS_DIR_FLAG)