feat: NFD local feature discovery for aws placement groups

[supershal]

What problem does this PR solve?:
NOTE: This PR stacked on CAPA fork upgrade PR #1360 . once this is merged, I will rebase it.

• Automatically label nodes with placement group and partition id using node feature discovery local feature

• When user provides existing placement group when creating AWS or EKS cluster, A NFD source script will be dropped in /etc/kubernetes/node-feature-discovery/source.d/placementgroup_discovery.sh on the node using cloud-init.

Cloud-init then executes this script during node initialization. which will eventually create a file with feature labels in /etc/kubernetes/node-feature-discovery/features.d/placementgroup

NFD Daemon on each node will read this file to set/remove labels on the Node object.

Applications can use this information to make node aware scheduling decisions.

Which issue(s) this PR fixes:
Fixes #

How Has This Been Tested?:

Currently tested manually and with unit tests. We will add e2e tests support for EKS.

• cluster.yaml

apiVersion: cluster.x-k8s.io/v1beta1
kind: Cluster
metadata:
  annotations:
    preflight.cluster.caren.nutanix.com/skip: all
  labels:
    cluster.x-k8s.io/provider: eks
  name: shalin-eks
spec:
  topology:
    class: eks-quick-start
    controlPlane:
      metadata:
        annotations:
          controlplane.cluster.x-k8s.io/skip-kube-proxy: ""
    variables:
    - name: clusterConfig
      value:
        addons:
          clusterAutoscaler: {}
          cni:
            provider: Cilium
          csi:
            defaultStorage:
              provider: aws-ebs
              storageClassConfig: default
            providers:
              aws-ebs:
                storageClassConfigs:
                  default: {}
            snapshotController: {}
          nfd: {}
        kubeProxy:
            mode: disabled
        eks:
          region: us-west-2
    version: v1.34.1
    workers:
      machineDeployments:
      - class: default-worker
        metadata:
          annotations:
            cluster.x-k8s.io/cluster-api-autoscaler-node-group-max-size: "1"
            cluster.x-k8s.io/cluster-api-autoscaler-node-group-min-size: "1"
        name: md-0
        variables:
          overrides:
          - name: workerConfig
            value:
              eks:
                instanceType: m5.2xlarge
                placementGroup:
                  name: eks-cn-aos

• Inspect labels on the nodes

> kubectl get nodes --kubeconfig shalin-eks.conf -o yaml | grep placement
feature.node.kubernetes.io/aws-placement-group: eks-cn-aos

> kubectl get nodes --kubeconfig shalin-eks.conf -o yaml | grep partition
 feature.node.kubernetes.io/partition: "1"

Special notes for your reviewer:

[dkoshkin]

Just minor comments, but really liking the use of NFD here!