feat: implementation for user defined configmap for cilium addon in cluster creation

[manoj-nutanix]

What problem does this PR solve?:

implementation for user defined cilium configmap in cluster creation, current PR's implementation covers only configmap kind and assumes that clusterctl.cluster.x-k8s.io/move label is added on configmap by user.

pending PRs:

1. Implementation for Secret kind object for user defined cilium spec.

Which issue(s) this PR fixes:
Fixes #
NCN-105148

How Has This Been Tested?:

Special notes for your reviewer:

$ kg cluster
NAME               CLUSTERCLASS          PHASE         AGE   VERSION
nkp-mgmt-cluster   nutanix-quick-start   Provisioned   15m   v1.31.4

$ kg cm custom-cilium-cni-helm-values-template -oyaml
apiVersion: v1
data:
  values.yaml: |-
    cni:
      chainingMode: portmap
      exclusive: false
    hubble:
      enabled: true
      tls:
        auto:
          enabled: true               # enable automatic TLS certificate generation
          method: cronJob             # auto generate certificates using cronJob method
          certValidityDuration: 60    # certificates validity duration in days (default 2 months)
          schedule: "0 0 5 * *"       
      relay:
        enabled: true
        image:
          useDigest: false
    ipam:
      mode: kubernetes
    image:
      useDigest: false
    operator:
      image:
        useDigest: false
    certgen:
      image:
        useDigest: false
    socketLB:
      hostNamespaceOnly: true
    envoy:
      image:
        useDigest: false
kind: ConfigMap
metadata:
  annotations:
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"v1","data":{"values.yaml":"cni:\n  chainingMode: portmap\n  exclusive: false\nhubble:\n  enabled: true\n  tls:\n    auto:\n      enabled: true               # enable automatic TLS certificate generation\n      method: cronJob             # auto generate certificates using cronJob method\n      certValidityDuration: 60    # certificates validity duration in days (default 2 months)\n      schedule: \"0 0 5 * *\"       # schedule on the 1st day regeneration of each month\n  relay:\n    enabled: true\n    image:\n      useDigest: false\nipam:\n  mode: kubernetes\nimage:\n  useDigest: false\noperator:\n  image:\n    useDigest: false\ncertgen:\n  image:\n    useDigest: false\nsocketLB:\n  hostNamespaceOnly: true\nenvoy:\n  image:\n    useDigest: false"},"kind":"ConfigMap","metadata":{"annotations":{},"labels":{"cluster.x-k8s.io/cluster-name":"nkp-mgmt-cluster","clusterctl.cluster.x-k8s.io/move":""},"name":"custom-cilium-cni-helm-values-template","namespace":"default"}}
  creationTimestamp: "2025-02-04T14:55:33Z"
  labels:
    cluster.x-k8s.io/cluster-name: nkp-mgmt-cluster
    clusterctl.cluster.x-k8s.io/move: ""
  name: custom-cilium-cni-helm-values-template
  namespace: default
  resourceVersion: "23373"
  uid: 943620cd-a1a0-4d99-8383-d68e4329d029

$ kg hcp cilium-0194d059-494c-7879-a6bd-fe281ba362d9 -oyaml
apiVersion: addons.cluster.x-k8s.io/v1alpha1
kind: HelmChartProxy
metadata:
  creationTimestamp: "2025-02-04T14:56:33Z"
  finalizers:
  - helmchartproxy.addons.cluster.x-k8s.io
  generation: 1
  name: cilium-0194d059-494c-7879-a6bd-fe281ba362d9
  namespace: default
  ownerReferences:
  - apiVersion: cluster.x-k8s.io/v1beta1
    kind: Cluster
    name: nkp-mgmt-cluster
    uid: 83c0cc69-7100-41f5-a415-ccff87c8d03e
  resourceVersion: "26337"
  uid: f70e9e27-45a8-4832-9497-a94306b7ec30
spec:
  chartName: cilium
  clusterSelector:
    matchLabels:
      cluster.x-k8s.io/cluster-name: nkp-mgmt-cluster
  namespace: kube-system
  options:
    enableClientCache: false
    install:
      createNamespace: true
    timeout: 10m0s
    upgrade:
      maxHistory: 10
  releaseName: cilium
  repoURL: oci://helm-repository.default.svc/charts
  tlsConfig:
    caSecret:
      name: helm-repository-tls
      namespace: default
  valuesTemplate: |-
    cni:
      chainingMode: portmap
      exclusive: false
    hubble:
      enabled: true
      tls:
        auto:
          enabled: true               # enable automatic TLS certificate generation
          method: cronJob             # auto generate certificates using cronJob method
          certValidityDuration: 60    # certificates validity duration in days (default 2 months)
          schedule: "0 0 5 * *"       # schedule on the 1st day regeneration of each month
      relay:
        enabled: true
        image:
          useDigest: false
    ipam:
      mode: kubernetes
    image:
      useDigest: false
    operator:
      image:
        useDigest: false
    certgen:
      image:
        useDigest: false
    socketLB:
      hostNamespaceOnly: true
    envoy:
      image:
        useDigest: false
  version: 1.16.4
status:
  conditions:
  - lastTransitionTime: "2025-02-04T15:04:13Z"
    status: "True"
    type: Ready
  - lastTransitionTime: "2025-02-04T15:04:13Z"
    status: "True"
    type: HelmReleaseProxiesReady
  - lastTransitionTime: "2025-02-04T15:02:45Z"
    status: "True"
    type: HelmReleaseProxySpecsUpToDate
  matchingClusters:
  - apiVersion: cluster.x-k8s.io/v1beta1
    kind: Cluster
    name: nkp-mgmt-cluster
    namespace: default
  observedGeneration: 1

[dkoshkin]

Nice and simple of a change!

[supershal]

LGTM. we should add unit test for this or some helpers for unit tests for addons.
Can we create a followup PR/jira to add unit tests.

[dkoshkin]

Thanks!