stop the search in get_processed_sibling_instruction when the parent instruction is reached #27289

Active on mainnet-beta (epoch 547), testnet (epoch 516) and devnet (epoch 569).

Introduced in solana-labs/solana PR #27290.

Feature id EYVpEP7uzH1CoXzbD6PubGhYmnxRXPeq3PPsm1ba3gpo.

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