pallet-scheduler: Fix migrations V2 to V3 (#10757)

* pallet-scheduler: Fix migrations V2 to V3

V2 already supported origins, so we need to move them over instead of setting it to `Root`. Besides
that it also removes the custom `Releases` enum and moves it over to `StorageVersion`.

* Fixes

* Fixes

* 🤦

substrate/frame/scheduler/src/tests.rs

@@ -21,7 +21,7 @@ use super::*;
 use crate::mock::{logger, new_test_ext, root, run_to_block, Call, LoggerCall, Scheduler, Test, *};
 use frame_support::{
 	assert_err, assert_noop, assert_ok,
-	traits::{Contains, OnInitialize, PreimageProvider},
+	traits::{Contains, GetStorageVersion, OnInitialize, PreimageProvider},
 	Hashable,
 };
 use sp_runtime::traits::Hash;
@@ -707,9 +707,7 @@ fn migration_to_v3_works() {
 			frame_support::migration::put_storage_value(b"Scheduler", b"Agenda", &k, old);
 		}
 
-		assert_eq!(StorageVersion::<Test>::get(), Releases::V1);
-
-		assert!(Scheduler::migrate_v1_to_v3());
+		Scheduler::migrate_v1_to_v3();
 
 		assert_eq_uvec!(
 			Agenda::<Test>::iter().collect::<Vec<_>>(),
@@ -783,7 +781,7 @@ fn migration_to_v3_works() {
 			]
 		);
 
-		assert_eq!(StorageVersion::<Test>::get(), Releases::V3);
+		assert_eq!(Scheduler::current_storage_version(), 3);
 	});
 }