Update and clean up chart default values.

* Updated defaults for enabling and disabling webhook patching and using cert-manager for webhooks.
* Removed unused properties from chart defaults. When webhook patching is disabled, the other properties are unused. For example, `{{- with .Values.admissionWebhooks.patch.tolerations }}` is nested within `{{- if ... .Values.admissionWebhooks.patch.enabled ... }}`.

packs/oam-app-controller-0.0.4/values.yaml

@@ -164,18 +164,11 @@ charts:
       certificate:
         mountPath: /etc/k8s-webhook-certs
       patch:
-        enabled: true
-        image:
-          repository: cgr.dev/chainguard/kube-webhook-certgen
-          tag: latest
-          pullPolicy: IfNotPresent
-        nodeSelector: {}
-        affinity: {}
-        tolerations: []
+        enabled: false
       appConversion:
         enabled: false
       certManager:
-        enabled: false
+        enabled: true
         revisionHistoryLimit: 3
 
     ## @param kubeClient.qps The qps for reconcile clients