Moves all test runtimes to use derive_impl (#2409)

Step in https://github.com/paritytech/polkadot-sdk/issues/171

This PR adds `derive_impl` on all `frame_system` config impls for mock
runtimes. The overridden configs are maintained as of now to ensure
minimal changes.

---------

Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

cumulus/parachains/runtimes/testing/penpal/src/lib.rs

@@ -35,7 +35,7 @@ pub mod xcm_config;
 use cumulus_pallet_parachain_system::RelayNumberStrictlyIncreases;
 use cumulus_primitives_core::{AggregateMessageOrigin, ParaId};
 use frame_support::{
-	construct_runtime,
+	construct_runtime, derive_impl,
 	dispatch::DispatchClass,
 	genesis_builder_helper::{build_config, create_default_config},
 	pallet_prelude::Weight,
@@ -323,6 +323,7 @@ parameter_types! {
 
 // Configure FRAME pallets to include in runtime.
 
+#[derive_impl(frame_system::config_preludes::TestDefaultConfig as frame_system::DefaultConfig)]
 impl frame_system::Config for Runtime {
 	/// The identifier used to distinguish between accounts.
 	type AccountId = AccountId;