Docs: recreates setup for oss alerting (#70156)

* recreates setup for oss alerting

* fixes relrefs

* fix relrefs

* fix relref

* adds other setup topics

* adds other setup topics 2

* adds other setup topics 3

* adds cloud setup

* adds cloud setup from legacy

* fixes links

* removing link

* gilles feedback

docs/sources/alerting/set-up/provision-alerting-resources/_index.md

@@ -9,7 +9,7 @@ keywords:
   - configure
   - provisioning
 title: Provision Grafana Alerting resources
-weight: 200
+weight: 300
 ---
 
 # Provision Grafana Alerting resources