[testnet] Add AssetHubRococo <-> AssetHubWestend asset bridging support (#1967)

## Summary

Asset bridging support for AssetHub**Rococo** <-> AssetHub**Wococo** was
added [here](https://github.com/paritytech/polkadot-sdk/pull/1215), so
now we aim to bridge AssetHub**Rococo** and AssetHub**Westend**. (And
perhaps retire AssetHubWococo and the Wococo chains).

## Solution

**bridge-hub-westend-runtime**
- added new runtime as a copy of `bridge-hub-rococo-runtime`
- added support for bridging to `BridgeHubRococo`
- added tests and benchmarks

**bridge-hub-rococo-runtime**
- added support for bridging to `BridgeHubWestend`
- added tests and benchmarks
- internal refactoring by splitting bridge configuration per network,
e.g., `bridge_to_whatevernetwork_config.rs`.

**asset-hub-rococo-runtime**
- added support for asset bridging to `AssetHubWestend` (allows to
receive only WNDs)
- added new xcm router for `Westend`
- added tests and benchmarks

**asset-hub-westend-runtime**
- added support for asset bridging to `AssetHubRococo` (allows to
receive only ROCs)
- added new xcm router for `Rococo`
- added tests and benchmarks

## Deployment

All changes will be deployed as a part of
https://github.com/paritytech/polkadot-sdk/issues/1988.

## TODO

- [x] benchmarks for all pallet instances
- [x] integration tests
- [x] local run scripts


Relates to:
https://github.com/paritytech/parity-bridges-common/issues/2602
Relates to: https://github.com/paritytech/polkadot-sdk/issues/1988

---------

Co-authored-by: command-bot <>
Co-authored-by: Adrian Catangiu <adrian@parity.io>
Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com>

Cargo.lock

@@ -905,6 +905,7 @@ dependencies = [
  "asset-test-utils",
  "assets-common",
  "bp-asset-hub-rococo",
+ "bp-asset-hub-westend",
  "bp-asset-hub-wococo",
  "bp-bridge-hub-rococo",
  "bp-bridge-hub-wococo",
@@ -1015,6 +1016,9 @@ version = "0.9.420"
 dependencies = [
  "asset-test-utils",
  "assets-common",
+ "bp-asset-hub-rococo",
+ "bp-asset-hub-westend",
+ "bp-bridge-hub-westend",
  "cumulus-pallet-aura-ext",
  "cumulus-pallet-dmp-queue",
  "cumulus-pallet-parachain-system",
@@ -1052,6 +1056,7 @@ dependencies = [
  "pallet-utility",
  "pallet-xcm",
  "pallet-xcm-benchmarks",
+ "pallet-xcm-bridge-hub-router",
  "parachains-common",
  "parity-scale-codec",
  "polkadot-core-primitives",
@@ -1066,7 +1071,6 @@ dependencies = [
  "sp-core",
  "sp-genesis-builder",
  "sp-inherents",
- "sp-io",
  "sp-offchain",
  "sp-runtime",
  "sp-session",
@@ -1682,6 +1686,16 @@ dependencies = [
  "scale-info",
 ]
 
+[[package]]
+name = "bp-asset-hub-westend"
+version = "0.1.0"
+dependencies = [
+ "bp-xcm-bridge-hub-router",
+ "frame-support",
+ "parity-scale-codec",
+ "scale-info",
+]
+
 [[package]]
 name = "bp-asset-hub-wococo"
 version = "0.1.0"
@@ -1745,6 +1759,19 @@ dependencies = [
  "sp-std",
 ]
 
+[[package]]
+name = "bp-bridge-hub-westend"
+version = "0.1.0"
+dependencies = [
+ "bp-bridge-hub-cumulus",
+ "bp-messages",
+ "bp-runtime",
+ "frame-support",
+ "sp-api",
+ "sp-runtime",
+ "sp-std",
+]
+
 [[package]]
 name = "bp-bridge-hub-wococo"
 version = "0.1.0"
@@ -1937,6 +1964,18 @@ dependencies = [
  "sp-trie",
 ]
 
+[[package]]
+name = "bp-westend"
+version = "0.1.0"
+dependencies = [
+ "bp-header-chain",
+ "bp-polkadot-core",
+ "bp-runtime",
+ "frame-support",
+ "sp-api",
+ "sp-std",
+]
+
 [[package]]
 name = "bp-wococo"
 version = "0.1.0"
@@ -2114,8 +2153,10 @@ name = "bridge-hub-rococo-runtime"
 version = "0.1.0"
 dependencies = [
  "bp-asset-hub-rococo",
+ "bp-asset-hub-westend",
  "bp-asset-hub-wococo",
  "bp-bridge-hub-rococo",
+ "bp-bridge-hub-westend",
  "bp-bridge-hub-wococo",
  "bp-header-chain",
  "bp-messages",
@@ -2124,6 +2165,7 @@ dependencies = [
  "bp-relayers",
  "bp-rococo",
  "bp-runtime",
+ "bp-westend",
  "bp-wococo",
  "bridge-hub-test-utils",
  "bridge-runtime-common",
@@ -2239,6 +2281,88 @@ dependencies = [
  "staging-xcm-executor",
 ]
 
+[[package]]
+name = "bridge-hub-westend-runtime"
+version = "0.1.0"
+dependencies = [
+ "bp-asset-hub-westend",
+ "bp-bridge-hub-rococo",
+ "bp-bridge-hub-westend",
+ "bp-header-chain",
+ "bp-messages",
+ "bp-parachains",
+ "bp-polkadot-core",
+ "bp-relayers",
+ "bp-rococo",
+ "bp-runtime",
+ "bp-westend",
+ "bridge-hub-test-utils",
+ "bridge-runtime-common",
+ "cumulus-pallet-aura-ext",
+ "cumulus-pallet-dmp-queue",
+ "cumulus-pallet-parachain-system",
+ "cumulus-pallet-session-benchmarking",
+ "cumulus-pallet-xcm",
+ "cumulus-pallet-xcmp-queue",
+ "cumulus-primitives-core",
+ "cumulus-primitives-utility",
+ "frame-benchmarking",
+ "frame-executive",
+ "frame-support",
+ "frame-system",
+ "frame-system-benchmarking",
+ "frame-system-rpc-runtime-api",
+ "frame-try-runtime",
+ "hex-literal",
+ "log",
+ "pallet-aura",
+ "pallet-authorship",
+ "pallet-balances",
+ "pallet-bridge-grandpa",
+ "pallet-bridge-messages",
+ "pallet-bridge-parachains",
+ "pallet-bridge-relayers",
+ "pallet-collator-selection",
+ "pallet-multisig",
+ "pallet-session",
+ "pallet-timestamp",
+ "pallet-transaction-payment",
+ "pallet-transaction-payment-rpc-runtime-api",
+ "pallet-utility",
+ "pallet-xcm",
+ "pallet-xcm-benchmarks",
+ "parachains-common",
+ "parity-scale-codec",
+ "polkadot-core-primitives",
+ "polkadot-parachain-primitives",
+ "polkadot-runtime-common",
+ "scale-info",
+ "serde",
+ "smallvec",
+ "sp-api",
+ "sp-block-builder",
+ "sp-consensus-aura",
+ "sp-core",
+ "sp-genesis-builder",
+ "sp-inherents",
+ "sp-io",
+ "sp-keyring",
+ "sp-offchain",
+ "sp-runtime",
+ "sp-session",
+ "sp-std",
+ "sp-storage",
+ "sp-transaction-pool",
+ "sp-version",
+ "staging-parachain-info",
+ "staging-xcm",
+ "staging-xcm-builder",
+ "staging-xcm-executor",
+ "static_assertions",
+ "substrate-wasm-builder",
+ "westend-runtime-constants",
+]
+
 [[package]]
 name = "bridge-runtime-common"
 version = "0.1.0"
@@ -12524,6 +12648,7 @@ dependencies = [
  "bridge-hub-kusama-runtime",
  "bridge-hub-polkadot-runtime",
  "bridge-hub-rococo-runtime",
+ "bridge-hub-westend-runtime",
  "clap 4.4.6",
  "collectives-polkadot-runtime",
  "color-print",