Kill the light client, CHTs and change tries. (#10080)

* Remove light client, change tries and CHTs

* Update tests

* fmt

* Restore changes_root

* Fixed benches

* Cargo fmt

* fmt

* fmt

substrate/client/network/src/service/tests.rs

@@ -116,7 +116,6 @@ fn build_test_full_node(
 		}),
 		network_config: config,
 		chain: client.clone(),
-		on_demand: None,
 		transaction_pool: Arc::new(crate::config::EmptyTransactionPool),
 		protocol_id,
 		import_queue,