[EKS] [request]: Leases for Fargate nodes remain after node termination

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

**Tell us about the problem you're trying to solve. What are you trying to do, and why is it hard?**
Leases for Fargate nodes are deleted when the node leave the cluster and are recreated just after.
Therefore leases for old Fargate nodes accumulate in the cluster.

**Are you currently working around this issue?**
We delete all leases in namespace kube-node-lease.

No source files, tests, or entry points are identified. Start by reviewing how EKS Fargate creates and removes Kubernetes Leases in the kube-node-lease namespace, then confirm the desired lifecycle with maintainers; done means leases for terminated Fargate nodes no longer accumulate or reappear.

Written by the indexing model from the issue text.