Docs: URL update to Relref to repair broken links (#23783)

* NewPanelEditor: Panel edit tweaks (#22415)

* NewPanelEditor: Alternative edit layout

* Fixed full height issue

* panel-edit-tabs experiment

* minor tweaks

* PanelEditor: Minor tweaks

* Docs: URL update to Relref to repair broken links

Rewrote URL references in the text for the Administration guide
and older Whats New page to repair broken links, and change
to the Relref format to build the website with Hugo.

Closes #22378

* Remove stale file, caught in this
branch and PR from my Fork. contribute/style-guides/markdown-style-guide.md

Co-authored-by: Torkel Ödegaard <torkel@grafana.com>
Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>

docs/sources/administration/provisioning.md

@@ -208,7 +208,7 @@ datasources:
 
 ### Dashboards
 
-It's possible to manage dashboards in Grafana by adding one or more yaml config files in the [`provisioning/dashboards`](/installation/configuration/#provisioning) directory. Each config file can contain a list of `dashboards providers` that will load dashboards into Grafana from the local filesystem.
+It's possible to manage dashboards in Grafana by adding one or more yaml config files in the [`provisioning/dashboards`]({{< relref "../installation/configuration.md" >}}) directory. Each config file can contain a list of `dashboards providers` that will load dashboards into Grafana from the local filesystem.
 
 The dashboard provider config file looks somewhat like this:
 

docs/sources/guides/whats-new-in-v5.md

@@ -115,7 +115,7 @@ We also deprecated the `[dashboard.json]` in favor of our new dashboard provisio
 in sync with dashboards in Grafana's database. The dashboard provisioner has multiple advantages over the old
 `[dashboard.json]` feature. Instead of storing the dashboard in memory we now insert the dashboard into the database,
 which makes it possible to star them, use one as the home dashboard, set permissions and other features in Grafana that
-expects the dashboards to exist in the database. More info in the [dashboard provisioning docs](/administration/provisioning/#dashboards)
+expects the dashboards to exist in the database. More info in the [dashboard provisioning docs]({{< relref "../administration/provisioning.md" >}})
 
 
 ## Graphite Tags and Integrated Function Docs