Sub-commands for benchmark (#11164)

* Restructure benchmark commands

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Add benchmark block test

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Fixup imports

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* CI

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Review fixes

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Extend error message

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Apply suggestions from code review

Co-authored-by: Zeke Mostov <z.mostov@gmail.com>

* Review fixes

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Add commands to node-template

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

Co-authored-by: Zeke Mostov <z.mostov@gmail.com>

substrate/bin/node/cli/tests/benchmark_overhead_works.rs

@@ -20,7 +20,7 @@ use assert_cmd::cargo::cargo_bin;
 use std::process::Command;
 use tempfile::tempdir;
 
-/// Tests that the `benchmark-overhead` command works for the substrate dev runtime.
+/// Tests that the `benchmark overhead` command works for the substrate dev runtime.
 #[test]
 fn benchmark_overhead_works() {
 	let tmp_dir = tempdir().expect("could not create a temp dir");
@@ -29,7 +29,7 @@ fn benchmark_overhead_works() {
 	// Only put 10 extrinsics into the block otherwise it takes forever to build it
 	// especially for a non-release build.
 	let status = Command::new(cargo_bin("substrate"))
-		.args(&["benchmark-overhead", "--dev", "-d"])
+		.args(&["benchmark", "overhead", "--dev", "-d"])
 		.arg(base_path)
 		.arg("--weight-path")
 		.arg(base_path)