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/conviction-voting/src/tests.rs

@@ -20,7 +20,7 @@
 use std::collections::BTreeMap;
 
 use frame_support::{
-	assert_noop, assert_ok, parameter_types,
+	assert_noop, assert_ok, derive_impl, parameter_types,
 	traits::{ConstU32, ConstU64, Contains, Polling, VoteTally},
 };
 use sp_core::H256;
@@ -51,6 +51,7 @@ impl Contains<RuntimeCall> for BaseFilter {
 	}
 }
 
+#[derive_impl(frame_system::config_preludes::TestDefaultConfig as frame_system::DefaultConfig)]
 impl frame_system::Config for Test {
 	type BaseCallFilter = BaseFilter;
 	type BlockWeights = ();