feat: 2s blocktime

[cl0w5]

Checklist

• runtime (general)
• tests
• node
• frontier
• system
• scheduler
• OpenGov + migration
• pallet-circuit-breaker
• deposit limits
• pallet-dca + migration
• pallet-dynamic-fees?
• pallet-ema-oracle
• pallet-liquidity-mining?
• pallet-stableswap?
• pallet-staking + migration
• weights
• script for removing votes by TC

Migrations

• pallet_staking::migrations::SetTwoSecBlocksSince
• pallet_gigahdx::migrations::SetTwoSecBlocksSince
• pallet_dca::migrations::MultiplySchedulesPeriodBy3
• hydradx_runtime::migrations::circuit_breaker
• hydradx_runtime::migrations::stableswap
• hydradx_runtime::migrations::scheduler
• hydradx_runtime::migrations::referenda
• hydradx_runtime::migrations::conviction_voting

[github-actions]

Crate versions that have not been updated:

• hydra-dx-math: v13.2.2
• pallet-ema-oracle: v1.12.0
• pallet-gigahdx: v1.1.0
• pallet-lbp: v4.13.0
• hydradx-runtime: v427.0.0

Crate versions that have been updated:

• hydradx: v15.0.2 -> v15.1.0
• pallet-dca: v1.18.1 -> v1.19.0
• pallet-staking: v5.1.0 -> v5.2.0
• primitives: v6.4.0 -> v6.4.1

Crate versions that have been downgraded:

• runtime-integration-tests: v1.100.0 -> v1.99.0
• pallet-fee-processor: v1.1.0 -> v1.0.0
• pallet-referrals: v1.6.1 -> v1.6.0
• hydradx-traits: v4.11.0 -> v4.10.0

Runtime version has not been increased.