Kindsys: update generated doc and add check in CI (#71871)

* clean up docs

* fix Windows path issue

* add verify-gen-cue to doc pipeline

* fix linting error

pkg/codegen/tmpl/docs.tmpl

@@ -2,6 +2,11 @@
 keywords:
   - grafana
   - schema
+labels:
+  products:
+    - cloud
+    - enterprise
+    - oss
 title: {{ .KindName }} kind
 ---
 > Both documentation generation and kinds schemas are in active development and subject to change without prior notice.