Support custom genesis block (#12291)

* Set genesis block data using the built genesis block

* Make resolve_state_version_from_wasm a separate function and some small refactorings

Useful for the commit following.

* Introduce trait BuildGenesisBlock

Substrate users can use this trait to implement their custom genesis block when constructing the
client.

* Make call_executor test compile

* cargo +nightly fmt --all

* Fix test

* Remove unnecessary clone

* FMT

* Apply review suggestions

* Revert changes to new_full_client() and new_full_parts() signature

* Remove needless `Block` type in `resolve_state_version_from_wasm`

substrate/client/service/test/src/client/mod.rs

@@ -1756,17 +1756,30 @@ fn storage_keys_iter_works() {
 fn cleans_up_closed_notification_sinks_on_block_import() {
 	use substrate_test_runtime_client::GenesisInit;
 
+	let backend = Arc::new(sc_client_api::in_mem::Backend::new());
+	let executor = substrate_test_runtime_client::new_native_executor();
+	let client_config = sc_service::ClientConfig::default();
+
+	let genesis_block_builder = sc_service::GenesisBlockBuilder::new(
+		&substrate_test_runtime_client::GenesisParameters::default().genesis_storage(),
+		!client_config.no_genesis,
+		backend.clone(),
+		executor.clone(),
+	)
+	.unwrap();
+
 	// NOTE: we need to build the client here instead of using the client
 	// provided by test_runtime_client otherwise we can't access the private
 	// `import_notification_sinks` and `finality_notification_sinks` fields.
 	let mut client = new_in_mem::<_, Block, _, RuntimeApi>(
-		substrate_test_runtime_client::new_native_executor(),
-		&substrate_test_runtime_client::GenesisParameters::default().genesis_storage(),
+		backend,
+		executor,
+		genesis_block_builder,
 		None,
 		None,
 		None,
 		Box::new(TaskExecutor::new()),
-		Default::default(),
+		client_config,
 	)
 	.unwrap();