genesis-builder: implemented for all runtimes (#1492)

This PR implements [`GenesisBuilder`
API](https://github.com/paritytech/polkadot-sdk/blob/a414ea7515c9cdc81f1d12410e646afc148250e8/substrate/primitives/genesis-builder/src/lib.rs#L38)
for all the runtimes in polkadot repo.

Step towards: paritytech/polkadot-sdk#25

---------

Co-authored-by: ordian <write@reusable.software>

cumulus/parachains/runtimes/bridge-hubs/bridge-hub-rococo/src/lib.rs

@@ -45,6 +45,7 @@ use sp_version::RuntimeVersion;
 use frame_support::{
 	construct_runtime,
 	dispatch::DispatchClass,
+	genesis_builder_helper::{build_config, create_default_config},
 	parameter_types,
 	traits::{ConstBool, ConstU32, ConstU64, ConstU8, Everything},
 	weights::{ConstantMultiplier, Weight},
@@ -1233,6 +1234,16 @@ impl_runtime_apis! {
 			Ok(batches)
 		}
 	}
+
+	impl sp_genesis_builder::GenesisBuilder<Block> for Runtime {
+		fn create_default_config() -> Vec<u8> {
+			create_default_config::<RuntimeGenesisConfig>()
+		}
+
+		fn build_config(config: Vec<u8>) -> sp_genesis_builder::Result {
+			build_config::<RuntimeGenesisConfig>(config)
+		}
+	}
 }
 
 cumulus_pallet_parachain_system::register_validate_block! {