Make 'openssl list' less sensitive for providers without params

When a provider can't return parameters, make that a warning instead of an
error, and continue to list further providers.

Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
Reviewed-by: Todd Short <todd.short@me.com>
(Merged from #22866)

(cherry picked from commit 7ebaab7)

apps/list.c

@@ -1238,6 +1238,9 @@ static void list_provider_info(void)
     sk_OSSL_PROVIDER_sort(providers);
     for (i = 0; i < sk_OSSL_PROVIDER_num(providers); i++) {
         const OSSL_PROVIDER *prov = sk_OSSL_PROVIDER_value(providers, i);
+        const char *provname = OSSL_PROVIDER_get0_name(prov);
+
+        BIO_printf(bio_out, "  %s\n", provname);
 
         /* Query the "known" information parameters, the order matches below */
         params[0] = OSSL_PARAM_construct_utf8_ptr(OSSL_PROV_PARAM_NAME,
@@ -1250,23 +1253,23 @@ static void list_provider_info(void)
         params[4] = OSSL_PARAM_construct_end();
         OSSL_PARAM_set_all_unmodified(params);
         if (!OSSL_PROVIDER_get_params(prov, params)) {
-            BIO_printf(bio_err, "ERROR: Unable to query provider parameters\n");
-            return;
-        }
-
-        /* Print out the provider information, the params order matches above */
-        BIO_printf(bio_out, "  %s\n", OSSL_PROVIDER_get0_name(prov));
-        if (OSSL_PARAM_modified(params))
-            BIO_printf(bio_out, "    name: %s\n", name);
-        if (OSSL_PARAM_modified(params + 1))
-            BIO_printf(bio_out, "    version: %s\n", version);
-        if (OSSL_PARAM_modified(params + 2))
-            BIO_printf(bio_out, "    status: %sactive\n", status ? "" : "in");
-        if (verbose) {
-            if (OSSL_PARAM_modified(params + 3))
-                BIO_printf(bio_out, "    build info: %s\n", buildinfo);
-            print_param_types("gettable provider parameters",
-                              OSSL_PROVIDER_gettable_params(prov), 4);
+            BIO_printf(bio_err,
+                       "WARNING: Unable to query provider parameters for %s\n",
+                       provname);
+        } else {
+            /* Print out the provider information, the params order matches above */
+            if (OSSL_PARAM_modified(params))
+                BIO_printf(bio_out, "    name: %s\n", name);
+            if (OSSL_PARAM_modified(params + 1))
+                BIO_printf(bio_out, "    version: %s\n", version);
+            if (OSSL_PARAM_modified(params + 2))
+                BIO_printf(bio_out, "    status: %sactive\n", status ? "" : "in");
+            if (verbose) {
+                if (OSSL_PARAM_modified(params + 3))
+                    BIO_printf(bio_out, "    build info: %s\n", buildinfo);
+                print_param_types("gettable provider parameters",
+                                  OSSL_PROVIDER_gettable_params(prov), 4);
+            }
         }
     }
     sk_OSSL_PROVIDER_free(providers);