Switch to aws-sdk-go-v2 vendored library

[dims]

aws-sdk will be going away next year-ish... please see announcement here: https://aws.amazon.com/blogs/developer/announcing-end-of-support-for-aws-sdk-for-go-v1-on-july-31-2025/

Let's please start switching to the new aws-sdk-go-v2

Looks like several projects in k8s github orgs have already done so! https://cs.k8s.io/?q=aws-sdk-go-v2&i=nope&files=go.mod&excludeFiles=&repos=

cc @cartermckinnon @kmala @prateekgogia

[kmala]

/triage accepted

[k8s-ci-robot]

@kmala: The label triage/accepted cannot be applied. Only GitHub organization members can add the label.

In response to [this](https://github.com/kubernetes/cloud-provider-aws/issues/932#issuecomment-2142638623): >/triage accepted Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes-sigs/prow](https://github.com/kubernetes-sigs/prow/issues/new?title=Prow%20issue:) repository.

[cartermckinnon]

/triage accepted

cc: @Issacwww

[rifelpet]

Kops just completed our migration if you're looking for any reference PRs: https://github.com/kubernetes/kops/issues/16424

[dims]

thanks @rifelpet !!

[dims]

cc @cartermckinnon