Bridges subtree update (#2602)

## Summary

This PR aligns Rococo/Westend bridge with latest Bridges repo
development:
- https://github.com/paritytech/parity-bridges-common/pull/2727
- https://github.com/paritytech/parity-bridges-common/pull/2728
- https://github.com/paritytech/parity-bridges-common/pull/2729




Part of: https://github.com/paritytech/parity-bridges-common/issues/2452

cumulus/parachains/runtimes/bridge-hubs/bridge-hub-westend/src/lib.rs

@@ -488,6 +488,7 @@ construct_runtime!(
 		BridgeRococoGrandpa: pallet_bridge_grandpa::<Instance1>::{Pallet, Call, Storage, Event<T>, Config<T>} = 42,
 		BridgeRococoParachains: pallet_bridge_parachains::<Instance1>::{Pallet, Call, Storage, Event<T>} = 43,
 		BridgeRococoMessages: pallet_bridge_messages::<Instance1>::{Pallet, Call, Storage, Event<T>, Config<T>} = 44,
+		XcmOverBridgeHubRococo: pallet_xcm_bridge_hub::<Instance1>::{Pallet} = 45,
 
 		// Message Queue. Importantly, is registered last so that messages are processed after
 		// the `on_initialize` hooks of bridging pallets.
@@ -921,7 +922,13 @@ impl_runtime_apis! {
 
 				fn export_message_origin_and_destination(
 				) -> Result<(MultiLocation, NetworkId, InteriorMultiLocation), BenchmarkError> {
-					Ok((WestendLocation::get(), NetworkId::Rococo, X1(Parachain(100))))
+					Ok(
+						(
+							bridge_to_rococo_config::FromAssetHubWestendToAssetHubRococoRoute::get().location,
+							NetworkId::Rococo,
+							X1(Parachain(bridge_to_rococo_config::AssetHubRococoParaId::get().into()))
+						)
+					)
 				}
 
 				fn alias_origin() -> Result<(MultiLocation, MultiLocation), BenchmarkError> {