Description
ClusterDeploymentCustomization allow us to patch install-config templates and customize its json paths per cluster deployment.
The struct was created to represent a json patch as defined in RFC6902 althrough, in the CDC struct the "value" member is defined as String and does not accepts Lists or Dicts as defined in the RFC.
This design block us from adding Lists and Dicts as customized values in our deployments.

Example:

apiVersion: hive.openshift.io/v1
kind: ClusterDeploymentCustomization
metadata:
  name: cdc-01
  namespace: test
spec:
  installConfigPatches:
    - op: add
      path: /controlPlane/platform/openstack/additionalNetworkIDs
      value:
        - 56dc14b2-f3be-4919-bf91-61aa99832376
        - 96f637e8-6b43-462b-acf0-11ea1fd66e7b

Acceptance Criteria
1. ClusterDeploymentCustomization spec accepting dict/list values and applying them properly. openshift-installer is unmarshaling the JSON and installing the cluster with the provided customization.