Update desired hashes per tick on epoch boundary

Active on mainnet-beta (epoch 539), testnet (epoch 516) and devnet (epoch 560).

Introduced in solana-labs/solana PR #29659.

Feature id 3uFHb9oKdGfgZGJK9EHaAXN4USvnQtAFC13Fh5gGFS5B.

Vortex

• Consensus leaderboard
• Fees leaderboard
• Validators
• Stake pools
• Decentralization
• Client versions
• Cluster status
• Governance
• Feature gates
• SIMDs
• Activity
• API and AI usage