feat: Opengov

[vgantchev]

This PR adds OpenGov which for some time will run in parallel to gov v1.

• Tracks and curves: https://docs.google.com/spreadsheets/d/1qN_Jbz8BctWd2hu-O98NH3LoEFe0TvbGGobmBx3e12A/edit?gid=0#gid=0
• Origins: https://docs.google.com/spreadsheets/d/1uZKwzy4vv1W10XslKcyRVOBPX0Pm7PcWKpSoG36Xvh0/edit?gid=1291784088#gid=1291784088

TODO:

• Tracks
• Replace runtime origins
• Exclude Referenda from CallFilter
• Hook up staking
• make it possible for Treasurer origin to control the Treasury account - handled by feat: dispatch as Treasury or AAVEManager from OpenGov #973
• rebench referenda, whitelist and conviction-voting ?

fixes #958

[github-actions]

Crate versions that have been updated:

• runtime-integration-tests: v1.25.3 -> v1.25.4
• pallet-circuit-breaker: v1.1.26 -> v1.1.27
• pallet-dca: v1.6.3 -> v1.6.4
• pallet-liquidation: v1.0.0 -> v1.0.1
• pallet-omnipool: v4.3.6 -> v4.3.7
• pallet-omnipool-liquidity-mining: v2.4.0 -> v2.4.1
• pallet-otc: v2.0.3 -> v2.0.4
• pallet-otc-settlements: v1.0.5 -> v1.0.6
• pallet-route-executor: v2.6.2 -> v2.6.3
• pallet-stableswap: v4.1.0 -> v4.1.1
• pallet-staking: v3.1.2 -> v4.0.0
• pallet-transaction-pause: v1.0.4 -> v1.1.0
• hydradx-adapters: v1.3.8 -> v1.3.9
• hydradx-runtime: v274.0.0 -> v275.0.0

Runtime version has been increased.