Reduce the execution time of some tests (#10377)

* Reduce the execution time of some tests

* Fix

* Fix build

* fmt

substrate/frame/session/benchmarking/src/mock.rs

@@ -183,6 +183,7 @@ impl pallet_staking::Config for Test {
 	type ElectionProvider = onchain::OnChainSequentialPhragmen<Self>;
 	type GenesisElectionProvider = Self::ElectionProvider;
 	type SortedListProvider = pallet_staking::UseNominatorsMap<Self>;
+	type BenchmarkingConfig = pallet_staking::TestBenchmarkingConfig;
 	type WeightInfo = ();
 }