Docs: Refactor administration docs (#50592) (#50989)

* Move data source management to administration

* Move RBAC to administration

* Move team management up a docs org level

* Combine and rename admin preferences docs

* Move plugin management to administration

* Combine plugin management docs

* Combine API key docs

* Combine service account docs

* Combine server user management docs

* Move datasource management to administration

* Move enterprise licenses to administration

* Move CLI out of admin, update links to admin

* Merge org user management docs

* Restructure to Torkel's plan

* Fix typo

* Weigh admin topics for navigation

* Weigh administration topics and align to Torkel's plan

* Move server user management from server admin to admin/user management

* Move configure docker image to setup guide

* Move the remaining server admin docs to the root admin directory

* Reweight docker config

Backport of 845cebdee2 from main

docs/sources/shared/getting-started/first-step.md

@@ -6,7 +6,7 @@ title: First step of Getting started with...
 
 #### Install Grafana and add your first dashboard
 
-Use the instructions in [Build your first dashboard]({{< relref "../../getting-started/build-first-dashboard/" >}}) to:
+Use the instructions in [Build your first dashboard]({{< relref "../build-first-dashboard/" >}}) to:
 
 - Install Grafana.
 - Sign in to Grafana.