cumulus: add asset-hub-rococo runtime based on asset-hub-kusama and add asset-bridging support to it (#1215)

This commit adds Rococo Asset Hub dedicated runtime so we can test new
features here, before merging them in Kusama Asset Hub.
Also adds one such feature: asset transfer over bridge (Rococo AssetHub
<> Wococo AssetHub)

- clone `asset-hub-kusama-runtime` -> `asset-hub-rococo-runtime`
- make it use Rococo primitives, names, assets, constants, etc
- add asset-transfer-over-bridge support to Rococo AssetHub <> Wococo
AssetHub

Fixes #1128

---------

Co-authored-by: Branislav Kontur <bkontur@gmail.com>
Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com>
Co-authored-by: Francisco Aguirre <franciscoaguirreperez@gmail.com>

cumulus/parachains/runtimes/assets/asset-hub-rococo/src/weights/mod.rs

@@ -0,0 +1,45 @@
+// Copyright (C) Parity Technologies (UK) Ltd.
+// This file is part of Cumulus.
+
+// Cumulus is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Cumulus is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Cumulus.  If not, see <http://www.gnu.org/licenses/>.
+
+pub mod block_weights;
+pub mod cumulus_pallet_xcmp_queue;
+pub mod extrinsic_weights;
+pub mod frame_system;
+pub mod pallet_asset_conversion;
+pub mod pallet_assets_foreign;
+pub mod pallet_assets_local;
+pub mod pallet_assets_pool;
+pub mod pallet_balances;
+pub mod pallet_collator_selection;
+pub mod pallet_multisig;
+pub mod pallet_nft_fractionalization;
+pub mod pallet_nfts;
+pub mod pallet_proxy;
+pub mod pallet_session;
+pub mod pallet_timestamp;
+pub mod pallet_uniques;
+pub mod pallet_utility;
+pub mod pallet_xcm;
+pub mod pallet_xcm_bridge_hub_router_to_rococo;
+pub mod pallet_xcm_bridge_hub_router_to_wococo;
+pub mod paritydb_weights;
+pub mod rocksdb_weights;
+pub mod xcm;
+
+pub use block_weights::constants::BlockExecutionWeight;
+pub use extrinsic_weights::constants::ExtrinsicBaseWeight;
+pub use paritydb_weights::constants::ParityDbWeight;
+pub use rocksdb_weights::constants::RocksDbWeight;