Asset conversion nits (#2860)

* [asset-conv] Unused Balances type

* [asset-conv] native asset change

* Dedicated `AssetBalance` type for `pallet_assets` instances

* Improved local vs foreign asset handling + test for not allowing pool_assets in pool

* Removed `into_multiasset_id`

* Fix

* Refactor

* Fixed create_pool for benchmark with LocalAndForeignAssets (finally found it)

* ".git/.scripts/commands/fmt/fmt.sh"

* Revert

* fmt

* Migrates pools with `MultiLocation { parents: 0, interior: Here }` to `MultiLocation { parents: 1, interior: Here }`

* Allow `set_storage` for `AllowMultiAssetPools` / `LiquidityWithdrawalFee`

* Benchmarks work

* Removed comment + more defensive migration

* `T::Currency::transfer` -> `Balances::transfer_all` in migration

* Change pool_id in migration

* Update parachains/runtimes/assets/asset-hub-westend/src/lib.rs

* Bump substrate (manually)

* Bump polkadot

* Fixes from polkadot + clippy

* Fix for xcm-emulator tests (thank you Nacho)

---------

Co-authored-by: command-bot <>
Co-authored-by: Jegor Sidorenko <5252494+jsidorenko@users.noreply.github.com>

cumulus/parachains/integration-tests/emulated/assets/asset-hub-westend/Cargo.toml

@@ -7,6 +7,7 @@ description = "Asset Hub Westend runtime integration tests with xcm-emulator"
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "3.4.0", default-features = false }
+assert_matches = "1.5.0"
 
 # Substrate
 sp-runtime = { default-features = false, git = "https://github.com/paritytech/substrate", branch = "master" }