Docs: Refactor data sources content (#57573)

* Docs: Revise data source index

* Docs: Consolidate data source administration docs

* Docs: Revise panels docs related to data sources

* Docs: Revise Alertmanager data source

* Docs: Reorganize AWS CloudWatch data source docs

* Docs: Reorganize Azure Monitor data source docs

* Docs: Move azuremonitor to azure-monitor

* Docs: Revise Elasticsearch docs

* Docs: Move Elasticsearch index into bundle

* Docs: Revise GCM docs

* Docs: Revise Graphite docs

* Docs: Move Graphite index into bundle

* Docs: Revise InfluxDB docs

* Docs: Revise Jaeger docs

* Docs: Move Jaeger index into bundle

* Docs: Revise Loki docs

* Docs: Move Loki index into bundle

* Docs: Revise MS SQL docs

* Docs: Move MS SQL index into bundle

* Docs: Revise Prometheus docs

* Docs: Move Prometheus index into bundle

* Docs: Revise Tempo docs

* Docs: Move Tempo index into bundle

* Docs: Revise TestData DB docs

* Docs: Move TestData DB index into bundle

* Docs: Revise Zipkin docs

* Docs: Move Zipkin index into bundle

* Docs: Move other data sources' index pages into bundles

* Docs: Revise frontmatter

* Fixing hugo markdown errors

* Docs: Add query editor and template var sections to overview doc

* Docs: Remove CTAs across data source docs

* Docs: Remove CTA

* Docs: Remove CTA

* Docs: Fix links, images, typos, and usage consistency.

* Docs: Fix typos

* Docs: Fix CI issues

* Update docs/sources/datasources/_index.md

Co-authored-by: Torkel Ödegaard <torkel@grafana.com>

* Update docs/sources/datasources/_index.md

Co-authored-by: Torkel Ödegaard <torkel@grafana.com>

* Docs: Fix query editor links

* Update docs/sources/panels-visualizations/_index.md

Co-authored-by: Torkel Ödegaard <torkel@grafana.com>

* Update docs/sources/panels-visualizations/_index.md

Co-authored-by: Torkel Ödegaard <torkel@grafana.com>

* Docs: Rebundle child pages per writers' toolkit

* Docs: Fix prettier for CI

* Docs: Fix relrefs from outside data sources docs

* Docs: Fix broken relrefs within datasources

* Docs: Fix relrefs to data sources docs

* Fixed some more refs

Co-authored-by: Torkel Ödegaard <torkel@grafana.com>

docs/sources/dashboards/variables/add-template-variables/index.md

@@ -85,7 +85,7 @@ Query expressions can contain references to other variables and in effect create
 > **Note:** Query expressions are different for each data source. For more information, refer to the documentation for your [data source]({{< relref "../../../datasources/" >}}).
 
 1. [Enter general options](#enter-general-options).
-1. In the **Data source** list, select the target data source for the query. For more information about data sources, refer to [Add a data source]({{< relref "../../../datasources/add-a-data-source/" >}}).
+1. In the **Data source** list, select the target data source for the query. For more information about data sources, refer to [Add a data source]({{< relref "../../../administration/data-source-management#add-a-data-source" >}}).
 1. In the **Refresh** list, select when the variable should update options.
    - **On Dashboard Load:** Queries the data source every time the dashboard loads. This slows down dashboard loading, because the variable query needs to be completed before dashboard can be initialized.
    - **On Time Range Change:** Queries the data source when the dashboard time range changes. Only use this option if your variable options query contains a time range filter or is dependent on the dashboard time range.
@@ -139,7 +139,7 @@ Constant variables are useful when you have complex values that you need to incl
 _Data source_ variables enable you to quickly change the data source for an entire dashboard. They are useful if you have multiple instances of a data source, perhaps in different environments.
 
 1. [Enter general options](#enter-general-options).
-1. In the **Type** list, select the target data source for the variable. For more information about data sources, refer to [Add a data source]({{< relref "../../../datasources/add-a-data-source/" >}}).
+1. In the **Type** list, select the target data source for the variable. For more information about data sources, refer to [Add a data source]({{< relref "../../../administration/data-source-management#add-a-data-source" >}}).
 1. (Optional) In **Instance name filter**, enter a regex filter for which data source instances to choose from in the variable value drop-down list. Leave this field empty to display all instances.
 1. (Optional) Enter [Selection Options]({{< relref "#configure-variable-selection-options" >}}).
 1. In **Preview of values**, Grafana displays a list of the current variable values. Review them to ensure they match what you expect.
@@ -180,7 +180,7 @@ _Ad hoc filters_ enable you to add key/value filters that are automatically adde
 > **Note:** Ad hoc filter variables only work with Prometheus, Loki, InfluxDB, and Elasticsearch data sources.
 
 1. [Enter general options](#enter-general-options).
-1. In the **Data source** list, select the target data source. For more information about data sources, refer to [Add a data source]({{< relref "../../../datasources/add-a-data-source/" >}}).
+1. In the **Data source** list, select the target data source. For more information about data sources, refer to [Add a data source]({{< relref "../../../administration/data-source-management#add-a-data-source" >}}).
 1. Click **Add** to add the variable to the dashboard.
 
 ### Create ad hoc filters
@@ -301,7 +301,7 @@ Currently only supported for Prometheus and Loki data sources. This variable rep
 
 ### $\_\_rate_interval
 
-Currently only supported for Prometheus data sources. The `$__rate_interval` variable is meant to be used in the rate function. Refer to [Prometheus query variables]({{< relref "../../../datasources/prometheus.md#using-__rate_interval">}}) for details.
+Currently only supported for Prometheus data sources. The `$__rate_interval` variable is meant to be used in the rate function. Refer to [Prometheus query variables]({{< relref "../../../datasources/prometheus/template-variables#use-__rate_interval" >}}) for details.
 
 ### $timeFilter or $\_\_timeFilter