Put HRMP Channel Management on General Admin Track (#7477)

* create ManagerOrigin for HRMP

* missed one

* fix mock

* update GeneralAdmin docs

polkadot/runtime/kusama/src/governance/origins.rs

@@ -38,7 +38,7 @@ pub mod pallet_custom_origins {
 		Treasurer,
 		/// Origin for managing the composition of the fellowship.
 		FellowshipAdmin,
-		/// Origin for managing the registrar.
+		/// Origin for managing the registrar and permissioned HRMP channel operations.
 		GeneralAdmin,
 		/// Origin for starting auctions.
 		AuctionAdmin,

polkadot/runtime/kusama/src/lib.rs

@@ -1155,6 +1155,7 @@ impl parachains_dmp::Config for Runtime {}
 impl parachains_hrmp::Config for Runtime {
 	type RuntimeOrigin = RuntimeOrigin;
 	type RuntimeEvent = RuntimeEvent;
+	type ChannelManager = EitherOf<EnsureRoot<Self::AccountId>, GeneralAdmin>;
 	type Currency = Balances;
 	type WeightInfo = weights::runtime_parachains_hrmp::WeightInfo<Runtime>;
 }