AlertingNG: Temp endpoint to translate dashboard alert into rule group (#32694)

* Set NoData and ExecErr states
* make save an option
* TODOs
* adjust interval
* FOR and alertRuleTags not done yet

pkg/services/ngalert/api/api_ruler.go

@@ -214,3 +214,17 @@ func toGettableExtendedRuleNode(r ngmodels.AlertRule) apimodels.GettableExtended
 		},
 	}
 }
+
+func toPostableExtendedRuleNode(r ngmodels.AlertRule) apimodels.PostableExtendedRuleNode {
+	return apimodels.PostableExtendedRuleNode{
+		GrafanaManagedAlert: &apimodels.PostableGrafanaRule{
+			OrgID:        r.OrgID,
+			Title:        r.Title,
+			Condition:    r.Condition,
+			Data:         r.Data,
+			UID:          r.UID,
+			NoDataState:  apimodels.NoDataState(r.NoDataState),
+			ExecErrState: apimodels.ExecutionErrorState(r.ExecErrState),
+		},
+	}
+}