Which component are you using?: cluster-autoscaler for EKS

/area cluster-autoscaler

Is your feature request designed to solve a problem? If so describe the problem this feature should solve.:
cluster-autoscaler uses AWS SDK for Go v1 which has been end-of-support since July 31, 2025. Furthermore, the older sdk version doesn't support useful features like overriding service endpoints via environment variables.

Describe the solution you'd like.:
Update the code to utilize AWS SDK for Go v2.

Describe any alternative solutions you've considered.:

Additional context.: