Increase coverage of 'Grafana Cloud' labels (#64646)

* Add 'Grafana Cloud' label to content

All pages are applicable to both 'Open source' and 'Grafana Cloud'

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Add 'Grafana Cloud' label to administration content with some exceptions

- Enterprise licensing is 'Open source' and 'Enterprise'.
- 'Manage Organizations', 'Provision Grafana', and 'Stats and License' are 'Open source' only.

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Remove OSS from enterprise-licensing content

* Apply suggestions from code review

---------

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

docs/sources/whatsnew/_index.md

@@ -53,6 +53,11 @@ aliases:
   - whats-new-in-v6-5/
   - whats-new-in-v6-6/
   - whats-new-in-v6-7/
+cascade:
+  labels:
+    products:
+      - cloud
+      - oss
 title: What's new
 weight: 1
 ---