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/nfts/src/mock.rs

@@ -21,7 +21,7 @@ use super::*;
 use crate as pallet_nfts;
 
 use frame_support::{
-	construct_runtime, parameter_types,
+	construct_runtime, derive_impl, parameter_types,
 	traits::{AsEnsureOriginWithArg, ConstU32, ConstU64},
 };
 use sp_core::H256;
@@ -46,6 +46,7 @@ pub type Signature = MultiSignature;
 pub type AccountPublic = <Signature as Verify>::Signer;
 pub type AccountId = <AccountPublic as IdentifyAccount>::AccountId;
 
+#[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 = ();