[EKS][request]: extend AmazonEKSLoadBalancingClusterPolicy to support EKS Auto Mode

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**Tell us about your request**

Add `create`/`update`/`delete` on `ingressclasses.networking.k8s.io` and
`ingressclassparams.eks.amazonaws.com` to `AmazonEKSLoadBalancingClusterPolicy`
(currently `get`/`list`/`watch` only).

**Which service(s) is this request for?**

EKS (Access Entries / Auto Mode)

**Tell us about the problem you're trying to solve. What are you trying to do, and why is it hard?**
What outcome are you trying to achieve, ultimately, and why is it hard/impossible to do right now? What is the impact of not having this problem solved? The more details you can provide, the better we'll be able to understand and solve the problem.

We want an AWS-provided EKS access policy that lets a customer principal manage IngressClass/IngressClassParams for EKS Auto Mode's built-in ALB controller, without granting `AmazonEKSClusterAdminPolicy`. `AmazonEKSLoadBalancingClusterPolicy` does not allow this.

**Are you currently working around this issue?**

`AmazonEKSClusterAdminPolicy`, or custom `ClusterRole`/`ClusterRoleBinding`.

**Additional context**

N/A

**Attachments**

N/A

Start with the requested AmazonEKSLoadBalancingClusterPolicy change and the EKS Auto Mode resources named in the issue: ingressclasses.networking.k8s.io and ingressclassparams.eks.amazonaws.com. Compare the current get/list/watch permissions with the requested create/update/delete permissions, and consider the stated goal of avoiding AmazonEKSClusterAdminPolicy. Done means AWS provides the requested scoped access policy.

Written by the indexing model from the issue text.