Use larger key size for DSA/DH tests

OpenSSL 3 validates allowed sizes strictly, pick minimum sizes
that are supported.

Author: nikic

ext/openssl/tests/bug73711.cnf

@@ -4,9 +4,14 @@ Bug #73711: Segfault in openssl_pkey_new when generating DSA or DH key
 openssl
 --FILE--
 <?php
-$cnf = __DIR__ . DIRECTORY_SEPARATOR . 'bug73711.cnf';
-var_dump(openssl_pkey_new(["private_key_type" => OPENSSL_KEYTYPE_DSA, 'config' => $cnf]));
-var_dump(openssl_pkey_new(["private_key_type" => OPENSSL_KEYTYPE_DH, 'config' => $cnf]));
+var_dump(openssl_pkey_new([
+    "private_key_type" => OPENSSL_KEYTYPE_DSA,
+    "private_key_bits" => 1024,
+]));
+var_dump(openssl_pkey_new([
+    "private_key_type" => OPENSSL_KEYTYPE_DH,
+    "private_key_bits" => 512,
+]));
 echo "DONE";
 ?>
 --EXPECTF--