Fix base-path handling in key insert (#7775)

This fixes the handling of base-path when using `key insert`. Before
the base-path wasn't setup correctly, as done when starting a node. This
resulted in putting the keys into the wrong directory. This pr fixes
this by creating the correct base-path/config dir for the keystore.
Besides that it also removes the insert command from `subkey` as it
doesn't make that much sense. If requested, we could bring it back later.

substrate/bin/node-template/node/src/command.rs

@@ -66,7 +66,7 @@ pub fn run() -> sc_cli::Result<()> {
 	let cli = Cli::from_args();
 
 	match &cli.subcommand {
-		Some(Subcommand::Key(cmd)) => cmd.run(),
+		Some(Subcommand::Key(cmd)) => cmd.run(&cli),
 		Some(Subcommand::BuildSpec(cmd)) => {
 			let runner = cli.create_runner(cmd)?;
 			runner.sync_run(|config| cmd.run(config.chain_spec, config.network))