Docs: Update configuration.md (#25707)

* Update configuration.md

* moved configuration.md to administration folder

* updated links

* Added quota section

* Update upgrading.md

* Update configuration.md

* Update configuration.md

* Update configuration.md

* Updating links

* Update configuration.md

* Update configuration.md

* Update configuration.md

Reworked the security options

* Update configuration.md

* Update configuration.md

* Update provisioning.md

* Update provisioning.md

* Update configuration.md

* Update configuration.md

* Update docs/sources/administration/configuration.md

Co-authored-by: Marcus Efraimsson <marcus.efraimsson@gmail.com>

Co-authored-by: Marcus Efraimsson <marcus.efraimsson@gmail.com>

docs/sources/developers/plugins/legacy/_index.md

@@ -87,7 +87,7 @@ export { WorldmapCtrl as PanelCtrl };
 There are three ways that you can start developing a Grafana plugin.
 
 1. Set up a Grafana development environment. [(described here)](https://github.com/grafana/grafana/blob/master/contribute/developer-guide.md) and place your plugin in the `data/plugins` folder.
-2. Install Grafana and place your plugin in the plugins directory which is set in your [config file](/installation/configuration). By default this is `/var/lib/grafana/plugins` on Linux systems.
+2. Install Grafana and place your plugin in the plugins directory which is set in your [config file](/administration/configuration). By default this is `/var/lib/grafana/plugins` on Linux systems.
 3. Place your plugin directory anywhere you like and specify it grafana.ini.
 
 We encourage people to set up the full Grafana environment so that you can get inspiration from the rest of the Grafana code base.