synapse: Add labels to configMapGenerator

deploy/dev/kustomization.yaml

@@ -76,6 +76,9 @@ secretGenerator:
   - homeserver.yaml=synapse-homeserver.yaml
   - signing.key=synapse-signing.key
   - log.config=synapse-log.config
+  options:
+    labels:
+      app: synapse
 
 patches:
 # Patch the metrics-server to not require TLS in dev cluster.

deploy/prod/kustomization.yaml

@@ -65,6 +65,9 @@ secretGenerator:
   - homeserver.yaml=secrets/synapse-homeserver.yaml
   - signing.key=secrets/synapse-signing.key
   - log.config=secrets/synapse-log.config
+  options:
+    labels:
+      app: synapse
 
 patches:
 # Patch the ingress-nginx deployment to allow it to use a service with a