CRD generator missing type for GenericKubernetesResource

[csviri]

Describe the bug

When updated fabric8 version for to 6.13.4 but also for 7.0.0+ versions, the CRD generator generated an invalid CRD for:

  @PreserveUnknownFields
  private GenericKubernetesResource resource;

the result:

resource:
     x-kubernetes-embedded-resource: true
     x-kubernetes-preserve-unknown-fields: true

when I try to apply such resource k8s gives an error message:

spec.validation.openAPIV3Schema.properties[spec].properties[childResources].items.properties[resource].type: Required value: must be object if x-kubernetes-embedded-resource is true

Fabric8 Kubernetes Client version

6.13.4

Steps to reproduce

Open this branch in Kubernetes Glue Operator:

1. https://github.com/java-operator-sdk/kubernetes-glue-operator/tree/quarkus-update
2. compile with mvn clean install -DskipTests
3. apply the generated crd from: kubernetes-glue-operator/target/kubernetes/glues.io.csviri.operator.glue-v1.yml

Expected behavior

What seems to be enough is to have type: object to be added to generated snipper:

resource:
     type: object
     x-kubernetes-embedded-resource: true
     x-kubernetes-preserve-unknown-fields: true

Runtime

Kubernetes (vanilla)

Kubernetes API Server version

1.25.3@latest

Environment

Linux

Fabric8 Kubernetes Client Logs

No response

Additional context

No response

[csviri]

Checked, that it is also present in 7.0.1 version.