fail libsecp256k1_verify if count appears wrong

Active on mainnet-beta (epoch 465), testnet (epoch 465) and devnet (epoch 433).

Introduced in solana-labs/solana PR #26415.

Feature id 54KAoNiUERNoWWUhTWWwXgym94gzoXFVnHyQwPA18V9A.

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