fix(olm): no owner for cluster scoped objects

[razvan]

Description

Part of stackabletech/issues#806

Secret class tls has no owner ref anymore:

$ k get secretclass tls -o yaml
apiVersion: secrets.stackable.tech/v1alpha2
kind: SecretClass
metadata:
  creationTimestamp: "2025-12-15T13:25:18Z"
  generation: 1
  labels:
    app.kubernetes.io/managed-by: secrets.stackable.tech_secretclass
    app.kubernetes.io/name: secrets.stackable.tech
    stackable.tech/vendor: Stackable
  name: tls
  resourceVersion: "31202"
  uid: 079bceb0-7014-4ce3-84d5-e5aaaddd501d
spec:
...

🟢 Tests:

Tested with the OLM manifests for the fictional 25.11.1 release from the fix/secret-no-owner-for-cluster-resources branch.

--- PASS: kuttl (164.78s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/listener_openshift-true (35.76s)
        --- PASS: kuttl/harness/tls-truststore_openshift-true_truststore-target-kind-Secret (11.40s)
        --- PASS: kuttl/harness/kerberos_krb5-1.21.1_openshift-true (63.61s)
        --- PASS: kuttl/harness/tls-truststore_openshift-true_truststore-target-kind-ConfigMap (10.26s)
        --- PASS: kuttl/harness/tls_openshift-true_rsa-key-length-3072_custom-secret-names-False (34.49s)
        --- PASS: kuttl/harness/cert-manager-tls_openshift-true (81.70s)
        --- PASS: kuttl/harness/tls_openshift-true_rsa-key-length-3072_custom-secret-names-True (37.33s)
        --- PASS: kuttl/harness/tls_openshift-true_rsa-key-length-2048_custom-secret-names-True (17.88s)
        --- PASS: kuttl/harness/tls_openshift-true_rsa-key-length-2048_custom-secret-names-False (18.19s)
PASS

[adwk67]

LGTM