fix: fixed whitespace for adding annotations

[naihsuanshao]

Currently adding annotation for eks role for cronjob is wrong, see here.

annotations:
  eks.amazonaws.com/role-arn: 'arn:aws:iam::471112759938:role/argo_root_core_platform_infra_dev_eks'
apiVersion: v1
automountServiceAccountToken: true
kind: ServiceAccount
metadata:
  labels:
    app.kubernetes.io/instance: argus-rdev-e54afa8b
    app.kubernetes.io/managed-by: Helm
    app.kubernetes.io/name: stack
    app.kubernetes.io/service: argus-rdev-e54afa8b-stack-syncawssecretmanager
    app.kubernetes.io/version: 1.16.0
    argocd.argoproj.io/instance: argus-rdev-e54afa8b
    helm.sh/chart: stack-2.5.2
  name: argus-rdev-e54afa8b-stack-syncawssecretmanager
  namespace: core-platform-rdev

Fixed this bug and added new unit tests.