Merge branch 'dennis/update-clickhouse-setup-docs' into 'master'

Update ClickHouse integration docs to guide user to enabling ClickHouse-backed features

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/168263



Merged-by: Adam Hegyi <ahegyi@gitlab.com>
Approved-by: Adam Hegyi <ahegyi@gitlab.com>
Co-authored-by: Dennis Tang <750946-dennis@users.noreply.gitlab.com>

doc/integration/clickhouse.md

@@ -127,3 +127,7 @@ To create the required database objects execute:
 ```shell
 sudo gitlab-rake gitlab:clickhouse:migrate
 ```
+
+### Enable ClickHouse for Analytics
+
+Now that your GitLab instance is connected to ClickHouse, you can enable features to use ClickHouse by [enabling ClickHouse for Analytics](../administration/analytics.md).