Do not use Option to wrap GenesisConfig fields (#8275)

Currently we wrap every `GenesisConfig` field in an `Option`, while
we require `Default` being implemented for all pallet genesisconfigs.
Passing `None` also results in the genesis not being initialized, which
is a bug as seen from the perspective of a pallet developer?

This pr changes the fields of the `GenesisConfig` to non `Option` types.

substrate/frame/support/test/tests/issue2219.rs

@@ -185,9 +185,9 @@ frame_support::construct_runtime!(
 #[test]
 fn create_genesis_config() {
 	GenesisConfig {
-		module: Some(module::GenesisConfig {
+		module: module::GenesisConfig {
 			request_life_time: 0,
 			enable_storage_role: true,
-		})
+		}
 	};
 }