cmd/k8s-operator: display Tailnet status with kubectl (#18401)

This commit modifies the `Tailnet` CRD to display its status when it
is queried using `kubectl get tailnets` and associated commands. This
allows users to see the status of their tailnets at a glance.

Updates: https://github.com/tailscale/corp/issues/34561

Signed-off-by: David Bond <davidsbond93@gmail.com>

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

@@ -19,6 +19,10 @@ spec:
         - jsonPath: .metadata.creationTimestamp
           name: Age
           type: date
+        - description: Status of the deployed Tailnet resources.
+          jsonPath: .status.conditions[?(@.type == "TailnetReady")].reason
+          name: Status
+          type: string
       name: v1alpha1
       schema:
         openAPIV3Schema:

cmd/k8s-operator/deploy/manifests/operator.yaml

@@ -5104,6 +5104,10 @@ spec:
             - jsonPath: .metadata.creationTimestamp
               name: Age
               type: date
+            - description: Status of the deployed Tailnet resources.
+              jsonPath: .status.conditions[?(@.type == "TailnetReady")].reason
+              name: Status
+              type: string
           name: v1alpha1
           schema:
             openAPIV3Schema:

k8s-operator/apis/v1alpha1/types_tailnet.go

@@ -18,6 +18,7 @@ var TailnetKind = "Tailnet"
 // +kubebuilder:subresource:status
 // +kubebuilder:resource:scope=Cluster,shortName=tn
 // +kubebuilder:printcolumn:name="Age",type="date",JSONPath=".metadata.creationTimestamp"
+// +kubebuilder:printcolumn:name="Status",type="string",JSONPath=`.status.conditions[?(@.type == "TailnetReady")].reason`,description="Status of the deployed Tailnet resources."
 
 type Tailnet struct {
 	metav1.TypeMeta   `json:",inline"`