feat(elasticloadbalancingv2): support TCP idle timeout for Network Load Balancer Listener (#31584)

### Issue # (if applicable)

Closes #31310.

### Reason for this change
To set idle timeout for NLB.

AWS Network Load Balancer now supports configurable TCP idle timeout.

Announcement: https://aws.amazon.com/about-aws/whats-new/2024/09/aws-network-load-balancer-tcp-idle-timeout/



### Description of changes
* Add attributes to `BaseListener` class.
* Add `tcpIdleTimeout` property to `NetworkListener` class.



### Description of how you validated changes
Add unit tests and integ test.



### Checklist
- [x] 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: mazyu36