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/membership/src/lib.rs

@@ -531,7 +531,7 @@ mod tests {
 	};
 
 	use frame_support::{
-		assert_noop, assert_ok, ord_parameter_types, parameter_types,
+		assert_noop, assert_ok, derive_impl, ord_parameter_types, parameter_types,
 		traits::{ConstU32, ConstU64, StorageVersion},
 	};
 	use frame_system::EnsureSignedBy;
@@ -551,6 +551,7 @@ mod tests {
 		pub static Prime: Option<u64> = None;
 	}
 
+	#[derive_impl(frame_system::config_preludes::TestDefaultConfig as frame_system::DefaultConfig)]
 	impl frame_system::Config for Test {
 		type BaseCallFilter = frame_support::traits::Everything;
 		type BlockWeights = ();