chore(lambda-nodejs): update integration test for bundling (#33770)

### Issue # (if applicable)

Closes #NA.

### Reason for this change

Integ test failing due to insufficient permissions to node user, change the command for testing

### Description of changes
Fixed command in nodejs bundling integ test

### Describe any new or updated permissions being added

NA


### Description of how you validated changes

yarn integ

### Checklist
- [ ] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: shikha372

packages/@aws-cdk-testing/framework-integ/test/aws-lambda-nodejs/test/integ.bundling-user.ts

@@ -21,7 +21,7 @@ new lambda.NodejsFunction(stack, 'ts-decorator-handler-root-user', {
         return ['id'];
       },
       afterBundling: function (_inputDir: string, _outputDir: string): string[] {
-        return ['mkdir test'];
+        return ['pwd'];
       },
     },
   },