Short Links: Add setting for changing expiration time (#86003)

* Add setting for changing shortlink expiration time

* Add docs, add better language

* put all the numbers in the duration 🤷

* 🙄

* update language to be correct and clear

* Add max limit and more documentation

docs/sources/explore/_index.md

@@ -137,7 +137,7 @@ Available in Grafana 7.3 and later versions.
 
 The Share shortened link capability allows you to create smaller and simpler URLs of the format /goto/:uid instead of using longer URLs with query parameters. To create a shortened link to the executed query, click the **Share** option in the Explore toolbar.
 
-A shortened link will automatically get deleted after seven (7) days from its creation if it's never used. If a link is used at least once, it won't ever get deleted.
+A shortened link that is not accessed will automatically get deleted after a [configurable period](https://grafana.com/docs/grafana/<GRAFANA_VERSION>/setup-grafana/configure-grafana/#short_links) (defaulting to seven days). If a link is used at least once, it won't be deleted.
 
 ### Sharing shortened links with absolute time
 

docs/sources/setup-grafana/configure-grafana/_index.md

@@ -1779,6 +1779,16 @@ Enable or disable the Query history. Default is `enabled`.
 
 <hr>
 
+## [short_links]
+
+Configures settings around the short link feature.
+
+### expire_time
+
+Short links which are never accessed are considered expired or stale, and will be deleted as cleanup. Set the expiration time in days. Default is `7` days. Maximum is `365` days, and setting above the maximum will have `365` set instead. Setting `0` means the short links will be cleaned up approximately every 10 minutes.
+
+<hr>
+
 ## [metrics]
 
 For detailed instructions, refer to [Internal Grafana metrics]({{< relref "../set-up-grafana-monitoring" >}}).