xcm-emulator: add Rococo<>Westend bridge and add tests for assets transfers over the bridge (#2251)

- switch from Rococo<>Wococo to Rococo<>Westend bridge
- add bidirectional simple tests
- remove Wococo chains from xcm-emulator
- added tests for assets transfers over Rococo<>Westend bridge 

fixes https://github.com/paritytech/parity-bridges-common/issues/2405

cumulus/parachains/integration-tests/emulated/chains/relays/wococo/Cargo.toml

@@ -1,30 +0,0 @@
-[package]
-name = "wococo-emulated-chain"
-version = "0.0.0"
-authors.workspace = true
-edition.workspace = true
-license = "Apache-2.0"
-description = "Wococo emulated chain"
-publish = false
-
-[dependencies]
-serde_json = "1.0.104"
-
-# Substrate
-sp-core = { path = "../../../../../../../substrate/primitives/core", default-features = false }
-sp-runtime = { path = "../../../../../../../substrate/primitives/runtime", default-features = false }
-sp-authority-discovery = { path = "../../../../../../../substrate/primitives/authority-discovery", default-features = false }
-sp-consensus-babe = { path = "../../../../../../../substrate/primitives/consensus/babe", default-features = false }
-beefy-primitives = { package = "sp-consensus-beefy", path = "../../../../../../../substrate/primitives/consensus/beefy" }
-grandpa = { package = "sc-consensus-grandpa", path = "../../../../../../../substrate/client/consensus/grandpa", default-features = false }
-pallet-im-online = { path = "../../../../../../../substrate/frame/im-online", default-features = false }
-
-# Polkadot
-polkadot-primitives = { path = "../../../../../../../polkadot/primitives", default-features = false }
-rococo-runtime-constants = { path = "../../../../../../../polkadot/runtime/rococo/constants", default-features = false }
-rococo-runtime = { path = "../../../../../../../polkadot/runtime/rococo" }
-
-# Cumulus
-parachains-common = { path = "../../../../../../parachains/common" }
-emulated-integration-tests-common = { path = "../../../common", default-features = false }
-rococo-emulated-chain = { path = "../rococo" }

cumulus/parachains/integration-tests/emulated/chains/relays/wococo/src/lib.rs

@@ -1,46 +0,0 @@
-// 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);