chore: [release-2.9.x] docs: Republish the sizing calculator but don't list it in the table of contents and don't index it (#13081)

Co-authored-by: Jack Baldry <jack.baldry@grafana.com>

docs/sources/setup/size/_index.md

@@ -1,4 +1,7 @@
 ---
+_build:
+  list: false
+noindex: true
 title: Size the cluster 
 menuTitle: Size the cluster 
 description: Tool that generates a Helm Chart values.yaml file based on expected ingestion, retention rate, and node type, to help size your Grafana deployment.
@@ -6,7 +9,6 @@ aliases:
   - ../installation/sizing/
   - ../installation/helm/generate
 weight: 100
-draft: true
 ---
 
 <link rel="stylesheet" href="../../query/analyzer/style.css">