[xcm-emulator] Chains generic over Network & Integration tests restructure (#2092)

Closes:
- #1383 
- Declared chains can be now be imported and reused in a different
crate.
- Chain declaration are now generic over a generic type `N` (the
Network)
- #1389
- Solved #1383, chains and networks declarations can be restructure to
avoid having to compile all chains when running integrations tests where
are not needed.
- Chains are now declared on its own crate (removed from
`integration-tests-common`)
- Networks are now declared on its own crate (removed from
`integration-tests-common`)
    - Integration tests will import only the relevant Network crate
- `integration-tests-common` is renamed to
`emulated-integration-tests-common`

All this is necessary to be able to implement what is described here:
https://github.com/paritytech/roadmap/issues/56#issuecomment-1777010553

---------

Co-authored-by: command-bot <>

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

@@ -0,0 +1,60 @@
+// Copyright (C) Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: Apache-2.0
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Substrate
+pub use frame_support::assert_ok;
+
+// Polkadot
+pub use xcm::{
+	prelude::{AccountId32 as AccountId32Junction, *},
+	v3::{
+		Error,
+		NetworkId::{Rococo as RococoId, Wococo as WococoId},
+	},
+};
+
+// Bridges
+pub use bp_messages::LaneId;
+
+// Cumulus
+pub use emulated_integration_tests_common::{
+	test_parachain_is_trusted_teleporter,
+	xcm_emulator::{
+		assert_expected_events, bx, helpers::weight_within_threshold, Chain, Parachain as Para,
+		RelayChain as Relay, Test, TestArgs, TestContext, TestExt,
+	},
+	xcm_helpers::{xcm_transact_paid_execution, xcm_transact_unpaid_execution},
+	PROOF_SIZE_THRESHOLD, REF_TIME_THRESHOLD, XCM_V3,
+};
+pub use parachains_common::{AccountId, Balance};
+pub use rococo_wococo_system_emulated_network::{
+	bridge_hub_rococo_emulated_chain::{
+		genesis::ED as BRIDGE_HUB_ROCOCO_ED, BridgeHubRococoParaPallet as BridgeHubRococoPallet,
+	},
+	rococo_emulated_chain::{genesis::ED as ROCOCO_ED, RococoRelayPallet as RococoPallet},
+	AssetHubRococoPara as AssetHubRococo, AssetHubRococoParaReceiver as AssetHubRococoReceiver,
+	AssetHubRococoParaSender as AssetHubRococoSender, AssetHubWococoPara as AssetHubWococo,
+	BridgeHubRococoPara as BridgeHubRococo, BridgeHubRococoParaReceiver as BridgeHubRococoReceiver,
+	BridgeHubRococoParaSender as BridgeHubRococoSender, BridgeHubWococoPara as BridgeHubWococo,
+	RococoRelay as Rococo, RococoRelayReceiver as RococoReceiver,
+	RococoRelaySender as RococoSender,
+};
+
+pub const ASSET_ID: u32 = 1;
+pub const ASSET_MIN_BALANCE: u128 = 1000;
+pub const ASSETS_PALLET_ID: u8 = 50;
+
+#[cfg(test)]
+mod tests;