SIMD-0565: Enable secp256r1 syscalls

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

Introduced in anza-xyz/agave PR #13918.

Feature id SeRjtX7Abiq5hQYbzdCny266oveDseHZh9tnrs2cdVC.

Related

• SIMD-0565

Vortex Testnet

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