Load Balancer Controller Gateway API

### Outline the high level topic of the lab

Now that the AWS Load Balancer Controller supports Gateway API there should be a lab that covers this:

https://kubernetes-sigs.github.io/aws-load-balancer-controller/latest/guide/gateway/gateway/

### Provide the flow of the lab exercise, including what sample application components will be used

Cover both L4 and L7 routing

### What additional AWS infrastructure or EKS addons/components will need to be created or installed to support this lab?

None

### What additional software or configuration will be required in the Cloud9 IDE?

None

### Are enhancements to the retail sample application required to support this lab exercise?

No