Bridge hub kusama/polkadot runtime upgrade with bridging

[bkontur]

Based on PoC for Rococo/Wococo Bridge.
Relates to: #2762 (asset transfer with pallet_xcm over this bridge)

PR introduces:

• bridging capabilities (pallets, cfg) to BridgeHubKusama to enable bridging to BridgeHubPolkadot
• bridging capabilities (pallets, cfg) to BridgeHubPolkadot to enable bridging to BridgeHubKusama
• support/configuration for bridging between Kusama:Statemine vs Polkadot:Statemint
• tests for both runtimes
• zombienets/scripts for local run for scenario: Move assets between AssetHubKusama local vs AssetHubPolkadot local networks over bridge (anybody can try https://github.com/paritytech/cumulus/pull/2528/files#diff-c0cdca6d4e2786a0c267c956c790fabaaa27c8a565e95f4b0ae6b49467bd763fR227)

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Context:

• Main goal of this first stage is to setup bridge between system parachains Kusama:AssetHub vs Polkadot:AssetHub. Next stage will be focused on adding support to allow bridging between arbitrary parachains here.
• Another goal of this PR is to pass security audit
• Even if we merge this and redeploy runtimes on live chains, the bridge wont work. The chain's governance needs to issue dedicated calls to start bridge working (more check cutover).

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Tasks:

• reonboard BridgeHubKusama with BridgeHubPolkadot on Westend
• prepare cutover plan for initialization and deployment (governance calls, relayers, ...) - [P-K Bridge] BridgeHub Kusama & BridgeHub Polkadot parachains story (bridge active and live) parity-bridges-common#2455

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More about bridges:
https://github.com/paritytech/parity-bridges-common/blob/master/docs/high-level-overview.md
https://github.com/paritytech/parity-bridges-common/blob/master/docs/polkadot-kusama-bridge-overview.md
https://forum.parity.io/t/bridges-team-updates/1403/11
https://forum.polkadot.network/t/bridge-hub-questions/2693/2
https://forum.polkadot.network/t/bridge-hub-questions/2693/5

[bkontur]

bot bench $ pallet bridge-hub-kusama bridge-hubs pallet_bridge_grandpa
bot bench $ pallet bridge-hub-kusama bridge-hubs pallet_bridge_parachains
bot bench $ pallet bridge-hub-kusama bridge-hubs pallet_bridge_messages
bot bench $ pallet bridge-hub-kusama bridge-hubs pallet_bridge_relayers
bot bench $ xcm bridge-hub-kusama bridge-hubs pallet_xcm_benchmarks::generic

[bkontur]

bot bench $ pallet bridge-hub-kusama bridge-hubs pallet_bridge_messages
bot bench $ pallet bridge-hub-kusama bridge-hubs pallet_bridge_relayers
bot bench $ xcm bridge-hub-kusama bridge-hubs pallet_xcm_benchmarks::generic

[bkontur]

bot bench $ pallet bridge-hub-polkadot bridge-hubs pallet_bridge_grandpa
bot bench $ pallet bridge-hub-polkadot bridge-hubs pallet_bridge_parachains
bot bench $ pallet bridge-hub-polkadot bridge-hubs pallet_bridge_messages
bot bench $ pallet bridge-hub-polkadot bridge-hubs pallet_bridge_relayers
bot bench $ xcm bridge-hub-polkadot bridge-hubs pallet_xcm_benchmarks::generic

[paritytech-processbot]

Rebased

[bkontur]

bot rebase

[paritytech-processbot]

Rebased