[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/chains/relays/wococo/src/lib.rs

@@ -0,0 +1,46 @@
+// 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.
+
+// Cumulus
+use emulated_integration_tests_common::{
+	impl_accounts_helpers_for_relay_chain, impl_assert_events_helpers_for_relay_chain,
+	impl_hrmp_channels_helpers_for_relay_chain, impl_send_transact_helpers_for_relay_chain,
+	xcm_emulator::decl_test_relay_chains,
+};
+
+// Wococo declaration
+decl_test_relay_chains! {
+	#[api_version(8)]
+	pub struct Wococo {
+		genesis = rococo_emulated_chain::genesis::genesis(),
+		on_init = (),
+		runtime = rococo_runtime,
+		core = {
+			SovereignAccountOf: rococo_runtime::xcm_config::LocationConverter,
+		},
+		pallets = {
+			XcmPallet: rococo_runtime::XcmPallet,
+			Sudo: rococo_runtime::Sudo,
+			Balances: rococo_runtime::Balances,
+			Hrmp: rococo_runtime::Hrmp,
+		}
+	},
+}
+
+// Wococo implementation
+impl_accounts_helpers_for_relay_chain!(Wococo);
+impl_assert_events_helpers_for_relay_chain!(Wococo);
+impl_hrmp_channels_helpers_for_relay_chain!(Wococo);
+impl_send_transact_helpers_for_relay_chain!(Wococo);