CRD generator doesn't handle correctly JsonNode type

[andreaTP]

Describe the bug

The CRD generator produce an empty object for fields with type JsonNode.

Fabric8 Kubernetes Client version

next (development version)

Steps to reproduce

Generate the CRD for a class containing a field like:

public JsonNode configuration;

the output is:

              configuration:
                type: object

Expected behavior

the expected output should be:

              configuration:
                type: object
                x-kubernetes-preserve-unknown-fields: true

Runtime

Kubernetes (vanilla), other (please specify in additional context)

Kubernetes API Server version

1.22.3@latest

Environment

other (please specify in additional context)

Fabric8 Kubernetes Client Logs

No response

Additional context

No response