test: fix invalid modulesLength for DSA keygen

During key generation, the default dsa_builtin_paramgen will reset
modulusLength to 512. But in dsa_builtin_paramgen2 this does not
happen, leading to lockup in FIPS mode.

PR-URL: #23732
Refs: #23430
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>

test/parallel/test-crypto-keygen.js

@@ -182,7 +182,7 @@ function convertDERToPEM(label, der) {
 {
   // Test async DSA key generation.
   generateKeyPair('dsa', {
-    modulusLength: 256,
+    modulusLength: 512,
     divisorLength: 256,
     publicKeyEncoding: {
       type: 'spki',