fix(e2e): remove outputFileTracingRoot from Next.js test templates (#8093)

Author: jacekradko

integration/templates/next-app-router/next.config.js

@@ -1,6 +1,4 @@
 /** @type {import('next').NextConfig} */
-const nextConfig = {
-  outputFileTracingRoot: '/',
-};
+const nextConfig = {};
 
 module.exports = nextConfig;

integration/templates/next-cache-components/next.config.js

@@ -1,6 +1,5 @@
 /** @type {import('next').NextConfig} */
 const nextConfig = {
-  outputFileTracingRoot: '/',
   cacheComponents: true,
 };