Label the Knative overlays with the knative release unit.

Serving-core and Kourier each carry the Deployments that exist in that upstream file. The render test expects the label and still rejects any other drift.

RELREG-WP-0002-T01

Assistant: grok
Assistant-Session: 01a15f9f-3d77-7d21-911b-d93c86f9d14f

install/knative/overlays/kourier/kustomization.yaml

@@ -9,3 +9,4 @@ patches:
   - path: cpu-requests.patch.yaml
   - path: hpa-caps.patch.yaml
   - path: service-clusterip.patch.yaml
+  - path: release-unit.patch.yaml

install/knative/overlays/kourier/release-unit.patch.yaml

@@ -0,0 +1,18 @@
+# Same label as rail-knative/substrate/v1.22.0/release-unit.patch.yaml.
+# These two Deployments ship in kourier.yaml. Serving-core Deployments stay
+# on the serving-core overlay.
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: net-kourier-controller
+  namespace: knative-serving
+  labels:
+    railiance.io/release-unit: knative
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: 3scale-kourier-gateway
+  namespace: kourier-system
+  labels:
+    railiance.io/release-unit: knative

install/knative/overlays/serving-core/kustomization.yaml

@@ -8,3 +8,4 @@ resources:
 patches:
   - path: cpu-requests.patch.yaml
   - path: hpa-caps.patch.yaml
+  - path: release-unit.patch.yaml

install/knative/overlays/serving-core/release-unit.patch.yaml

@@ -0,0 +1,34 @@
+# Same label as rail-knative/substrate/v1.22.0/release-unit.patch.yaml.
+# Serving-core Deployments only. Kourier's controller and gateway are on the
+# kourier overlay, because they are not in serving-core.yaml.
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: activator
+  namespace: knative-serving
+  labels:
+    railiance.io/release-unit: knative
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: autoscaler
+  namespace: knative-serving
+  labels:
+    railiance.io/release-unit: knative
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: controller
+  namespace: knative-serving
+  labels:
+    railiance.io/release-unit: knative
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: webhook
+  namespace: knative-serving
+  labels:
+    railiance.io/release-unit: knative