frame-benchmarking-cli: Remove native dispatch requirement (#14474)

* frame-benchmarking-cli: Remove native dispatch requirement

No need for this, we can just use the `WasmExecutor` directly.

* Fixes

* Pass benchmarking host functions

* Ensure we can pass custom host functions

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

@@ -124,7 +124,7 @@ pub fn run() -> sc_cli::Result<()> {
 							)
 						}
 
-						cmd.run::<Block, service::ExecutorDispatch>(config)
+						cmd.run::<Block, ()>(config)
 					},
 					BenchmarkCmd::Block(cmd) => {
 						let PartialComponents { client, .. } = service::new_partial(&config)?;