Alerting: Allow disabling recording rules write for a data source in the UI (#106664)

Adds a new "Allow as recording rules target" toggle to Prometheus datasource configuration that controls whether the datasource can be selected as a target for writing recording rules.
---------

Co-authored-by: ismail simsek <ismailsimsek09@gmail.com>
Co-authored-by: Konrad Lalik <konradlalik@gmail.com>

docs/sources/datasources/prometheus/configure/_index.md

@@ -61,6 +61,11 @@ refs:
       destination: /docs/grafana/<GRAFANA_VERSION>/setup-grafana/configure-grafana/#default_manage_alerts_ui_toggle
     - pattern: /docs/grafana-cloud/
       destination: /docs/grafana/<GRAFANA_VERSION>/setup-grafana/configure-grafana/#default_manage_alerts_ui_toggle
+  manage-recording-rules-toggle:
+    - pattern: /docs/grafana/
+      destination: /docs/grafana/<GRAFANA_VERSION>/setup-grafana/configure-grafana/#default_allow_recording_rules_target_alerts_ui_toggle
+    - pattern: /docs/grafana-cloud/
+      destination: /docs/grafana/<GRAFANA_VERSION>/setup-grafana/configure-grafana/#default_allow_recording_rules_target_alerts_ui_toggle
   private-data-source-connect:
     - pattern: /docs/grafana/
       destination: docs/grafana-cloud/connect-externally-hosted/private-data-source-connect/
@@ -81,6 +86,11 @@ refs:
       destination: /docs/grafana/<GRAFANA_VERSION>/setup-grafana/configure-grafana/#configuration-file-location
     - pattern: /docs/grafana-cloud/
       destination: /docs/grafana/<GRAFANA_VERSION>/setup-grafana/configure-grafana/#configuration-file-location
+  grafana-managed-recording-rules:
+    - pattern: /docs/grafana/
+      destination: /docs/grafana/<GRAFANA_VERSION>/alerting/alerting-rules/create-recording-rules/create-grafana-managed-recording-rules/
+    - pattern: /docs/grafana-cloud/
+      destination: /docs/grafana-cloud/alerting-and-irm/alerting/alerting-rules/create-recording-rules/create-grafana-managed-recording-rules/
 ---
 
 # Configure the Prometheus data source
@@ -179,6 +189,8 @@ Following are optional configuration settings you can configure for more control
 
 - **Manage alerts via Alerting UI** -Toggled on by default. This enables [data source-managed rules in Grafana Alerting](ref:alerting-alert-rules) for this data source. For `Mimir`, it enables managing data source-managed rules and alerts. For `Prometheus`, it only supports viewing existing rules and alerts, which are displayed as data source-managed. Change this by setting the [`default_manage_alerts_ui_toggle`](ref:manage-alerts-toggle) option in the `grafana.ini` configuration file.
 
+- **Allow as recording rules target** - Toggled on by default. This allows the data source to be selected as a target destination for writing [Grafana-managed recording rules](ref:grafana-managed-recording-rules). When enabled, this data source will appear in the target data source list when creating or importing recording rules. When disabled, the data source will be filtered out from recording rules target selection. Change this by setting the [`default_allow_recording_rules_target_alerts_ui_toggle`](ref:manage-recording-rules-toggle) option in the `grafana.ini` configuration file.
+
 **Interval behavior:**
 
 - **Scrape interval** - Sets the standard scrape and evaluation interval in Prometheus. The default is `15s`. This interval determines how often Prometheus scrapes targets. Set it to match the typical scrape and evaluation interval in your Prometheus configuration file. If you set a higher value than your Prometheus configuration, Grafana will evaluate data at this interval, resulting in fewer data points.
@@ -254,6 +266,7 @@ After you have provisioned a data source you cannot edit it.
         jsonData:
           httpMethod: POST
           manageAlerts: true
+          allowAsRecordingRulesTarget: true
           prometheusType: Prometheus
           prometheusVersion: 3.3.0
           cacheLevel: 'High'

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

@@ -888,6 +888,10 @@ Increasing this value allows processing more dashboards in each cleanup cycle bu
 
 Default behavior for the "Manage alerts via Alerting UI" toggle when configuring a data source. It only works if the data source's `jsonData.manageAlerts` prop does not contain a previously configured value.
 
+#### `default_allow_recording_rules_target_alerts_ui_toggle`
+
+Default behavior for the "Allow as recording rules target" toggle when configuring a data source. It only works if the data source's `jsonData.allowAsRecordingRulesTarget` prop does not contain a previously configured value.
+
 ### `[sql_datasources]`
 
 #### `max_open_conns_default`