SIMD-0685: Loader V3 Remove ExtendProgram

Not active on mainnet-beta; not active on testnet; not active on devnet.

Introduced in anza-xyz/agave PR #15775.

Feature id 5Ach9H8V5NCNDQg7Md6HnJmVttF3tzHwiWWucnnFd4jz.

Related

• SIMD-0685

Vortex Testnet

• Consensus leaderboard
• Validators
• Decentralization
• Cluster status
• Feature gates
• SIMDs
• Activity
• API and AI usage