[ci skip] Add tier labels to all namespace resources for Kyverno resource governance

Added `tier = var.tier` to kubernetes_namespace labels in ~73 service
modules. This enables Kyverno to generate LimitRange defaults,
ResourceQuotas, and PriorityClass injection for all namespaces.

Previously only 11 namespaces had tier labels; now all 80 active
namespaces are labeled. All pods restarted in rolling waves to pick
up the new policies.

modules/kubernetes/webhook_handler/main.tf

@@ -12,6 +12,9 @@ variable "ssh_key" {}
 resource "kubernetes_namespace" "webhook-handler" {
   metadata {
     name = "webhook-handler"
+    labels = {
+      tier = var.tier
+    }
   }
 }