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/session/src/mock.rs

@@ -35,7 +35,7 @@ use sp_staking::SessionIndex;
 use sp_state_machine::BasicExternalities;
 
 use frame_support::{
-	parameter_types,
+	derive_impl, parameter_types,
 	traits::{ConstU32, ConstU64},
 };
 
@@ -232,6 +232,7 @@ pub fn new_test_ext() -> sp_io::TestExternalities {
 	sp_io::TestExternalities::new(t)
 }
 
+#[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 = ();