[EKS] [regression] excessive etcdserver throttling

Ever since upgrading our EKS clusters to 1.35, it is becoming almost impossible to apply resources to newly created EKS clusters due to excessive throttling from etcd.

```
rpc error: code = ResourceExhausted desc = etcdserver: throttle: too many requests
```

After creating a new EKS cluster and applying manifests, helm-charts, etc, we almost always see throttling. This breaks helm install/upgrade actions and leads to broken installations.

This behaviour was not present in previous versions of EKS and I would like to request that new etcdservers are provisioned with more generous rate limits.

No repository file, test, or entry point is identified. Start by reproducing the throttling on a newly created EKS 1.35 cluster while applying manifests and Helm charts, then investigate the cluster's etcd rate-limit configuration. Done means new clusters accept these applications without recurring `etcdserver: throttle: too many requests` errors.

Written by the indexing model from the issue text.