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/pallets/collective-content/src/mock.rs

@@ -18,7 +18,7 @@
 pub use crate as pallet_collective_content;
 use crate::WeightInfo;
 use frame_support::{
-	ord_parameter_types, parameter_types,
+	derive_impl, ord_parameter_types, parameter_types,
 	traits::{ConstU32, ConstU64},
 	weights::Weight,
 };
@@ -55,6 +55,7 @@ impl pallet_collective_content::Config for Test {
 	type WeightInfo = CCWeightInfo;
 }
 
+#[derive_impl(frame_system::config_preludes::TestDefaultConfig as frame_system::DefaultConfig)]
 impl frame_system::Config for Test {
 	type BaseCallFilter = ();
 	type BlockWeights = ();