Upgrade to aws-load-balancer-controller v2

We're on the ALB ingress controller (v1). The same project has changed its name to the AWS Load Balancer Controller and very recently cut a v2 release. It's brand new so we should let it bake a while in the wild.

A good reason to upgrade to v2 is IngressGroup feature, which lets you share ALBs between namespaces. This would allow us to reduce our ALBs down to just 1, saving some monthly spend. Described here

Handy links:

• Installation docs from AWS: https://docs.aws.amazon.com/eks/latest/userguide/alb-ingress.html
• GH releases page: https://github.com/kubernetes-sigs/aws-load-balancer-controller/releases
• v1 to v2 migration guide: https://github.com/kubernetes-sigs/aws-load-balancer-controller/blob/main/docs/guide/upgrade/migrate_v1_v2.md

Comience con la guía de migración de v1-to-v2 enlazada, la documentación de instalación de AWS y la página de releases del controlador para comprender los pasos de actualización necesarios. Revise la configuración actual de ALB ingress controller del repositorio y, a continuación, verifique que el deployment utilice v2 y que la configuración prevista de IngressGroup pueda reducir el número de ALBs como se describe.