k8s-operator: add age column to all custom resources (#15663)

This change introduces an Age column in the output for all custom
resources to enhance visibility into their lifecycle status.

Fixes #15499

Signed-off-by: satyampsoni <satyampsoni@gmail.com>

cmd/k8s-operator/deploy/crds/tailscale.com_dnsconfigs.yaml

@@ -20,6 +20,9 @@ spec:
           jsonPath: .status.nameserver.ip
           name: NameserverIP
           type: string
+        - jsonPath: .metadata.creationTimestamp
+          name: Age
+          type: date
       name: v1alpha1
       schema:
         openAPIV3Schema: