Fix: warning: bases is deprecated use resources

Replace deprecated 'bases' field with 'resources' in Kustomization

The 'bases' field is no longer supported and has been replaced with the 'resources'
field in the Kustomization file.

Signed-off-by: Gloria Ciavarrini <gciavarrini@redhat.com>

hack/manifests/testing/kustomization.yaml

@@ -1,9 +1,11 @@
-bases:
-- ../base
+---
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
 resources:
 - ingress.yaml
 - ldap.yaml
 - postgres.yaml
+- ../base
 
 patchesStrategicMerge:
 - parodos-patch.yaml