ledger-tool: Workaround clap bug for encoding arg in genesis command (#32626)

The --encoding flag only makes sense for the genesis command if the
genesis accounts will be printed. Hence, the encoding flag used the
Arg::requires() function on --accounts argument.

However, in what appears to be a clap bug, this made the --accounts flag
required even though it should not be. So, remove the .requires()
dependency between these two arguments.

ledger-tool/src/main.rs

@@ -1488,7 +1488,7 @@ fn main() {
                     .requires("accounts")
                     .help("Do not print account data when printing account contents."),
             )
-            .arg(&accounts_data_encoding_arg.clone().requires("accounts"))
+            .arg(&accounts_data_encoding_arg)
         )
         .subcommand(
             SubCommand::with_name("genesis-hash")