Add missing settable entry OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST_PROPS f…

…or RSA asym

Reviewed-by: Tom Cosgrove <tom.cosgrove@arm.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from #20319)

(cherry picked from commit 2618361)

providers/implementations/asymciphers/rsa_enc.c

@@ -555,6 +555,7 @@ static int rsa_set_ctx_params(void *vprsactx, const OSSL_PARAM params[])
 
 static const OSSL_PARAM known_settable_ctx_params[] = {
     OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, NULL, 0),
+    OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST_PROPS, NULL, 0),
     OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, NULL, 0),
     OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST, NULL, 0),
     OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST_PROPS, NULL, 0),