@rollup/plugin-replace: specify preventAssignment: true (#33329)

This is to fix a warning since the option will be set to true in the next major version of the plugin

js/tests/integration/rollup.bundle.js

@@ -12,7 +12,8 @@ module.exports = {
   },
   plugins: [
     replace({
-      'process.env.NODE_ENV': '"production"'
+      'process.env.NODE_ENV': '"production"',
+      preventAssignment: true
     }),
     nodeResolve(),
     babel({