Use new Datadog GraphDefinitionRequest struct

This new struct avoids requiring to repeat the struct definition in this
code here. It avoids duplication and makes it more flexible so more
options can be added to the struct without breaking the code here.

builtin/providers/datadog/resource_datadog_timeboard.go

@@ -119,12 +119,9 @@ func buildTemplateVariables(terraformTemplateVariables *[]interface{}) *[]datado
 func appendRequests(datadogGraph *datadog.Graph, terraformRequests *[]interface{}) {
 	for _, t_ := range *terraformRequests {
 		t := t_.(map[string]interface{})
-		d := struct {
-			Query              string `json:"q"`
-			Stacked            bool   `json:"stacked"`
-			Aggregator         string
-			ConditionalFormats []datadog.DashboardConditionalFormat `json:"conditional_formats,omitempty"`
-		}{Query: t["q"].(string)}
+		d := datadog.GraphDefinitionRequest{
+			Query: t["q"].(string),
+		}
 		if stacked, ok := t["stacked"]; ok {
 			d.Stacked = stacked.(bool)
 		}