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/xcm/xcm-simulator/fuzzer/src/relay_chain.rs

@@ -21,6 +21,8 @@ use frame_support::{
 	traits::{Everything, Nothing},
 	weights::Weight,
 };
+
+use frame_system::EnsureRoot;
 use sp_core::{ConstU32, H256};
 use sp_runtime::{testing::Header, traits::IdentityLookup, AccountId32};
 
@@ -185,6 +187,7 @@ impl pallet_xcm::Config for Runtime {
 	type WeightInfo = pallet_xcm::TestWeightInfo;
 	#[cfg(feature = "runtime-benchmarks")]
 	type ReachableDest = ReachableDest;
+	type AdminOrigin = EnsureRoot<AccountId>;
 }
 
 parameter_types! {