OSSL_HPKE_get_ciphertext_size
size_t OSSL_HPKE_get_ciphertext_size(OSSL_HPKE_SUITE suite, size_t clearlen);
expanded = OSSL_HPKE_get_ciphertext_size(g_suite, clearlen);
if (!TEST_false(OSSL_HPKE_get_ciphertext_size(bad_suite, 0)))