SIMD-0683: Pass ABIv1 input metadata via registers r3-r5

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

Introduced in anza-xyz/agave PR #16025.

Feature id r3r5hXFhEZLB2VCDXmUysuDZj4oMbtW8JRVUqvQSgqE.

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