integration tests: add more emulated bridge tests (#7576)

Add emulated e2e tests for following scenarios:

Exporting native asset to another ecosystem:
- Sending WNDs from Penpal Westend to Penpal Rococo: PPW->AHW->AHR->PPR
- Sending WNDs from Westend Relay to Penpal Rococo: W->AHW->AHR->PPR
   Example: Westend Treasury funds something on Rococo Parachain.

Importing native asset from another ecosystem to its native ecosystem:
- Sending ROCs from Penpal Westend to Penpal Rococo: PPW->AHW->AHR->PPR
- Sending ROCs from Penpal Westend to Rococo Relay: PPW->AHW->AHR->R
   Example: Westend Parachain returns some funds to Rococo Treasury.

Signed-off-by: Adrian Catangiu <adrian@parity.io>

Cargo.lock

@@ -2868,6 +2868,7 @@ version = "1.0.0"
 dependencies = [
  "asset-hub-westend-runtime",
  "bridge-hub-westend-runtime",
+ "cumulus-pallet-parachain-system 0.7.0",
  "cumulus-pallet-xcmp-queue 0.7.0",
  "emulated-integration-tests-common",
  "frame-support 28.0.0",

cumulus/parachains/integration-tests/emulated/tests/bridges/bridge-hub-westend/Cargo.toml

@@ -37,6 +37,7 @@ pallet-bridge-messages = { workspace = true }
 # Cumulus
 asset-hub-westend-runtime = { workspace = true }
 bridge-hub-westend-runtime = { workspace = true }
+cumulus-pallet-parachain-system = { workspace = true }
 cumulus-pallet-xcmp-queue = { workspace = true }
 emulated-integration-tests-common = { workspace = true }
 parachains-common = { workspace = true, default-features = true }

cumulus/parachains/integration-tests/emulated/tests/bridges/bridge-hub-westend/src/lib.rs

@@ -61,8 +61,10 @@ mod imports {
 				LocalTeleportableToAssetHub as PenpalLocalTeleportableToAssetHub,
 				UniversalLocation as PenpalUniversalLocation,
 			},
-			PenpalAssetOwner, PenpalBParaPallet as PenpalBPallet,
+			PenpalAParaPallet as PenpalAPallet, PenpalAssetOwner,
+			PenpalBParaPallet as PenpalBPallet,
 		},
+		rococo_emulated_chain::RococoRelayPallet as RococoPallet,
 		westend_emulated_chain::{
 			genesis::ED as WESTEND_ED, westend_runtime::xcm_config::XcmConfig as WestendXcmConfig,
 			WestendRelayPallet as WestendPallet,
@@ -73,10 +75,11 @@ mod imports {
 		AssetHubWestendParaSender as AssetHubWestendSender, BridgeHubRococoPara as BridgeHubRococo,
 		BridgeHubWestendPara as BridgeHubWestend,
 		BridgeHubWestendParaReceiver as BridgeHubWestendReceiver,
-		BridgeHubWestendParaSender as BridgeHubWestendSender, PenpalBPara as PenpalB,
+		BridgeHubWestendParaSender as BridgeHubWestendSender, PenpalAPara as PenpalA,
+		PenpalAParaReceiver as PenpalAReceiver, PenpalBPara as PenpalB,
 		PenpalBParaReceiver as PenpalBReceiver, PenpalBParaSender as PenpalBSender,
-		WestendRelay as Westend, WestendRelayReceiver as WestendReceiver,
-		WestendRelaySender as WestendSender,
+		RococoRelay as Rococo, RococoRelayReceiver as RococoReceiver, WestendRelay as Westend,
+		WestendRelayReceiver as WestendReceiver, WestendRelaySender as WestendSender,
 	};
 
 	pub const ASSET_ID: u32 = 1;