Change to use the same subcommand syntax as subkey (#8678)

* Change to use the same subcommand syntax as subkey

* Update client/cli/src/commands/inspect_key.rs

* revert to InspectKeyCmd struct

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

@@ -41,7 +41,7 @@ pub enum Subcommand {
 		name = "inspect",
 		about = "Decode given block or extrinsic using current native runtime."
 	)]
-	Inspect(node_inspect::cli::InspectCmd),
+	Inspect(node_inspect::cli::InspectKeyCmd),
 
 	/// The custom benchmark subcommmand benchmarking runtime pallets.
 	#[structopt(name = "benchmark", about = "Benchmark runtime pallets.")]