feat(base-cluster/cert-manager): use oci repository (#1650)

See
<https://cert-manager.io/docs/installation/helm/#installing-from-the-oci-registry>


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Chores**
* Updated the repository URL for the "jetstack" chart to use an OCI
registry.
  * Updated the "cert-manager" chart version to "v1.17.2".

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: cwrau

charts/base-cluster/values.yaml

@@ -138,9 +138,9 @@ global:
         descheduler 0.27.x: 0.29.0
       condition: "{{ .Values.descheduler.enabled }}"
     jetstack:
-      url: https://charts.jetstack.io
+      url: oci://quay.io/jetstack/charts
       charts:
-        cert-manager: 1.17.2
+        cert-manager: v1.17.2
     nginx:
       url: https://kubernetes.github.io/ingress-nginx
       charts: