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>

substrate/frame/transaction-payment/asset-conversion-tx-payment/src/mock.rs

@@ -18,6 +18,7 @@ use crate as pallet_asset_conversion_tx_payment;
 
 use codec;
 use frame_support::{
+	derive_impl,
 	dispatch::DispatchClass,
 	instances::Instance2,
 	ord_parameter_types,
@@ -78,6 +79,7 @@ parameter_types! {
 	pub static TransactionByteFee: u64 = 1;
 }
 
+#[derive_impl(frame_system::config_preludes::TestDefaultConfig as frame_system::DefaultConfig)]
 impl frame_system::Config for Runtime {
 	type BaseCallFilter = frame_support::traits::Everything;
 	type BlockWeights = BlockWeights;