FIX deprecation warnings in kustomize 5

[juliusvonkohout]

What this PR does / why we need it:

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes # kubeflow/manifests#2985

@andreyvelich @tenzen-y i just copied over the commit for now

[andreyvelich]

cc @Electronic-Waste @helenxie-bit @tenzen-y @johnugeorge @saileshd1402

[andreyvelich]

Thank you @juliusvonkohout!
/lgtm
/approve

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

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[andreyvelich]

@juliusvonkohout Can you sign your commit ?

[juliusvonkohout]

@juliusvonkohout Can you sign your commit ?

I first need to verify that the output stays the same when i run kustomize
/hold

[juliusvonkohout]

$ diff -u old.yaml new.yaml
--- old.yaml    2025-02-10 18:50:39.299136200 +0100
+++ new.yaml    2025-02-10 18:50:19.568703200 +0100
@@ -913,7 +913,7 @@
 kind: MutatingWebhookConfiguration
 metadata:
   annotations:
-    cert-manager.io/inject-ca-from: kubeflow/katib-webhook-cert
+    cert-manager.io/inject-ca-from: KATIB_NAMESPACE_PLACEHOLDER/katib-webhook-cert
   name: katib.kubeflow.org
 webhooks:
 - admissionReviewVersions:
@@ -964,7 +964,7 @@
 kind: ValidatingWebhookConfiguration
 metadata:
   annotations:
-    cert-manager.io/inject-ca-from: kubeflow/katib-webhook-cert
+    cert-manager.io/inject-ca-from: KATIB_NAMESPACE_PLACEHOLDER/katib-webhook-cert
   name: katib.kubeflow.org
 webhooks:
 - admissionReviewVersions:

this is what i have to check

[juliusvonkohout]

@tarekabouzeid can you follow up here?

[mahdikhashan]

@tarekabouzeid can you follow up here?

shall i follow up here?

[andreyvelich]

That would be great @mahdikhashan!