fix port issue2

Author: RulaKhaled

dev-packages/node-integration-tests/suites/tracing/google-genai/scenario-streaming.mjs

@@ -38,7 +38,7 @@ function startMockGoogleGenAIServer() {
   });
 
   return new Promise(resolve => {
-    app.listen(server => {
+    const server = app.listen(0, () => {
       resolve(server);
     });
   });

dev-packages/node-integration-tests/suites/tracing/google-genai/scenario-tools.mjs

@@ -117,7 +117,7 @@ function startMockGoogleGenAIServer() {
   });
 
   return new Promise(resolve => {
-    app.listen(server => {
+    const server = app.listen(0, () => {
       resolve(server);
     });
   });

dev-packages/node-integration-tests/suites/tracing/google-genai/scenario.mjs

@@ -38,7 +38,7 @@ function startMockGoogleGenAIServer() {
   });
 
   return new Promise(resolve => {
-    app.listen(server => {
+    const server = app.listen(0, () => {
       resolve(server);
     });
   });