fix next.js on workers C3 e2e test

Next was asking interactively whether to use turbopack, which causes the test to hang

Author: petebacondarwin

packages/create-cloudflare/e2e-tests/frameworks/framework-test-config.ts

@@ -402,6 +402,7 @@ export default function getFrameworkTestConfig(pm: string) {
 				"--tailwind",
 				"--eslint",
 				"--app",
+				"--turbopack",
 				"--import-alias",
 				"@/*",
 				"--src-dir",