fix(metrics-server): add double dashes to extra arguments

[kasia-kujawa]

extraArgs for metric-server needs to be added with double dashes, see: https://github.com/kubernetes-sigs/metrics-server/blob/master/docs/command-line-flags.txt

and in metric-server helm chart extraArgs are described in following way:

## extraArgs:
##   - --kubelet-insecure-tls=true
##   - --kubelet-preferred-address-types=InternalIP
##
extraArgs: []

sumologic colllection adds know two extraArgs without dashes

    - kubelet-insecure-tls=true
    - kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname

which causes that extraArgs are not taken into account

current form of Pod spec:

$ kubectl get pod -n sumologic collection-metrics-server-57ff4db75-79fj7 -o yaml
apiVersion: v1
kind: Pod
metadata:
  annotations:
    cni.projectcalico.org/podIP: 10.1.126.187/32
    cni.projectcalico.org/podIPs: 10.1.126.187/32
  creationTimestamp: "2023-06-29T07:30:46Z"
  generateName: collection-metrics-server-57ff4db75-
  labels:
    app.kubernetes.io/instance: collection
    app.kubernetes.io/managed-by: Helm
    app.kubernetes.io/name: metrics-server
    helm.sh/chart: metrics-server-6.2.4
    pod-template-hash: 57ff4db75
  name: collection-metrics-server-57ff4db75-79fj7
  namespace: sumologic
  ownerReferences:
  - apiVersion: apps/v1
    blockOwnerDeletion: true
    controller: true
    kind: ReplicaSet
    name: collection-metrics-server-57ff4db75
    uid: 9cc6f5f4-1fd6-4294-8bab-a24e893bbf85
  resourceVersion: "37005"
  selfLink: /api/v1/namespaces/sumologic/pods/collection-metrics-server-57ff4db75-79fj7
  uid: b08f558e-8d7d-447d-a6c7-d8228d6695c7
spec:
  affinity:
    podAntiAffinity:
      preferredDuringSchedulingIgnoredDuringExecution:
      - podAffinityTerm:
          labelSelector:
            matchLabels:
              app.kubernetes.io/instance: collection
              app.kubernetes.io/name: metrics-server
          topologyKey: kubernetes.io/hostname
        weight: 1
  containers:
  - args:
    - --secure-port=8443
    - kubelet-insecure-tls=true
    - kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
    command:
    - metrics-server
    image: docker.io/bitnami/metrics-server:0.6.3-debian-11-r32
    imagePullPolicy: IfNotPresent
    livenessProbe:
      failureThreshold: 3
      httpGet:
        path: /livez
        port: https
        scheme: HTTPS
      periodSeconds: 10
      successThreshold: 1
      timeoutSeconds: 1
    name: metrics-server
    ports:
    - containerPort: 8443
      name: https
      protocol: TCP
    readinessProbe:
      failureThreshold: 3
      httpGet:
        path: /readyz
        port: https
        scheme: HTTPS
      periodSeconds: 10
      successThreshold: 1
      timeoutSeconds: 1
    resources: {}
    securityContext:
      readOnlyRootFilesystem: false
      runAsNonRoot: true
      runAsUser: 1001
    terminationMessagePath: /dev/termination-log
    terminationMessagePolicy: File
    volumeMounts:
    - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
      name: kube-api-access-9fl2v
      readOnly: true
  dnsPolicy: ClusterFirst
  enableServiceLinks: true
  nodeName: sumologic-kubernetes-collection
  preemptionPolicy: PreemptLowerPriority
  priority: 0
  restartPolicy: Always
  schedulerName: default-scheduler
  securityContext: {}
  serviceAccount: collection-metrics-server
  serviceAccountName: collection-metrics-server
  terminationGracePeriodSeconds: 30
  tolerations:
  - effect: NoExecute
    key: node.kubernetes.io/not-ready
    operator: Exists
    tolerationSeconds: 300
  - effect: NoExecute
    key: node.kubernetes.io/unreachable
    operator: Exists
    tolerationSeconds: 300
  volumes:
  - name: kube-api-access-9fl2v
    projected:
      defaultMode: 420
      sources:
      - serviceAccountToken:
          expirationSeconds: 3607
          path: token
      - configMap:
          items:
          - key: ca.crt
            path: ca.crt
          name: kube-root-ca.crt
      - downwardAPI:
          items:
          - fieldRef:
              apiVersion: v1
              fieldPath: metadata.namespace
            path: namespace
status:
  conditions:
  - lastProbeTime: null
    lastTransitionTime: "2023-06-29T07:30:47Z"
    status: "True"
    type: Initialized
  - lastProbeTime: null
    lastTransitionTime: "2023-06-29T07:30:47Z"
    message: 'containers with unready status: [metrics-server]'
    reason: ContainersNotReady
    status: "False"
    type: Ready
  - lastProbeTime: null
    lastTransitionTime: "2023-06-29T07:30:47Z"
    message: 'containers with unready status: [metrics-server]'
    reason: ContainersNotReady
    status: "False"
    type: ContainersReady
  - lastProbeTime: null
    lastTransitionTime: "2023-06-29T07:30:47Z"
    status: "True"
    type: PodScheduled
  containerStatuses:
  - containerID: containerd://c91d933598065151cd0b642d79babeb8ae906832a7b0c095d00d82c358993382
    image: docker.io/bitnami/metrics-server:0.6.3-debian-11-r32
    imageID: docker.io/bitnami/metrics-server@sha256:73256913f56528f8beb7804150104d9f722e121af11bdd76b745386d37684f11
    lastState: {}
    name: metrics-server
    ready: false
    restartCount: 0
    started: true
    state:
      running:
        startedAt: "2023-06-29T07:31:01Z"
  hostIP: 10.0.2.15
  phase: Running
  podIP: 10.1.126.187
  podIPs:
  - ip: 10.1.126.187
  qosClass: BestEffort
  startTime: "2023-06-29T07:30:47Z"

Checklist

• Changelog updated or skip changelog label added
• Documentation updated
• Template tests added