shake_out
shake_out(&ctx, out, out_len);
shake_out(keccak_ctx, block, sizeof(block));
shake_out(&ctx, out, MLKEM_SHARED_SECRET_LENGTH);
void shake_out(sha3_ctx *ctx, void *out, size_t len);
shake_out(&drng, seed, sizeof(seed));
shake_out(&drng, encap_entropy, sizeof(encap_entropy));
shake_out(&drng, invalid_ciphertext, invalid_ciphertext_len);
shake_out(&results, out, sizeof(out));