Vstam1/xcm admin origin (#6928)

* Ensure for a configurable origin in XCM (#6442), cherry picked from
5ae05e1a957857c449a43d8759a21292d03fd049

Add new associated type, AdminOrigin, bounded by EnsureOrigin trait in
XCM pallet. Replace ensure_root() with ensure_origin() from a
EnsureOrigin trait. Set AdminOrigin as EnsureRoot<AccountId> in xcm
configs.

* cargo fmt

* small stylistic change

---------

Co-authored-by: serkul <serkul@pop-os.localdomain>

polkadot/runtime/test-runtime/src/xcm_config.rs

@@ -19,6 +19,7 @@ use frame_support::{
 	traits::{Everything, Nothing},
 	weights::Weight,
 };
+use frame_system::EnsureRoot;
 use xcm::latest::prelude::*;
 use xcm_builder::{
 	AllowUnpaidExecutionFrom, EnsureXcmOrigin, FixedWeightBounds, SignedAccountId32AsNative,
@@ -146,4 +147,5 @@ impl pallet_xcm::Config for crate::Runtime {
 	type WeightInfo = pallet_xcm::TestWeightInfo;
 	#[cfg(feature = "runtime-benchmarks")]
 	type ReachableDest = ReachableDest;
+	type AdminOrigin = EnsureRoot<crate::AccountId>;
 }