Ignore ValidationSchema that results in registering all models

`ValidationSchema` is annotated with `@JsonDeserialize` which leads in
its entire type hierarchy being registered for reflective access along
with the corresponding methods. This essentially ends up registering all
models as in kubernetes-client 6.9.0 ValidationSchema was augmented to
implement `Editable<ValidationSchemaBuilder>`, which increases the
reachable types in comparison to previous versions.

Ignoring registrations for `ValidationSchema` aligns with what we
already do for `KubeSchema`.

Fixes #38683

(cherry picked from commit 637ebea)

extensions/kubernetes-client/deployment/src/main/java/io/quarkus/kubernetes/client/deployment/KubernetesClientProcessor.java

@@ -25,6 +25,7 @@
 import io.fabric8.kubernetes.api.model.KubeSchema;
 import io.fabric8.kubernetes.api.model.KubernetesResource;
 import io.fabric8.kubernetes.api.model.KubernetesResourceList;
+import io.fabric8.kubernetes.api.model.ValidationSchema;
 import io.fabric8.kubernetes.client.Config;
 import io.fabric8.kubernetes.client.CustomResource;
 import io.fabric8.kubernetes.client.DefaultKubernetesClient;
@@ -66,6 +67,7 @@ public class KubernetesClientProcessor {
     private static final DotName RESOURCE_EVENT_HANDLER = DotName
             .createSimple(io.fabric8.kubernetes.client.informers.ResourceEventHandler.class.getName());
     private static final DotName KUBERNETES_RESOURCE = DotName.createSimple(KubernetesResource.class.getName());
+    private static final DotName VALIDATION_SCHEMA = DotName.createSimple(ValidationSchema.class.getName());
     private static final DotName KUBERNETES_RESOURCE_LIST = DotName
             .createSimple(KubernetesResourceList.class.getName());
     private static final DotName KUBE_SCHEMA = DotName.createSimple(KubeSchema.class.getName());
@@ -190,6 +192,7 @@ public void process(ApplicationIndexBuildItem applicationIndex, CombinedIndexBui
         ignoredJsonDeserializationClasses.produce(
                 new IgnoreJsonDeserializeClassBuildItem(KUBERNETES_RESOURCE_LIST));
         ignoredJsonDeserializationClasses.produce(new IgnoreJsonDeserializeClassBuildItem(KUBERNETES_RESOURCE));
+        ignoredJsonDeserializationClasses.produce(new IgnoreJsonDeserializeClassBuildItem(VALIDATION_SCHEMA));
 
         final String[] deserializerClasses = combinedIndexBuildItem.getIndex()
                 .getAllKnownSubclasses(DotName.createSimple("com.fasterxml.jackson.databind.JsonDeserializer"))