CloudWatch: Change aggregateResponse to return slice instead of map (#48805)

* Rename tests

* Change test names

* Change metrics from map to slice

* Add test for one output, multiple MetricDataResults

* Rename test input file

* Use map instead of iterating over the response metrics

* Rename variable

* move partial data set to query row response

* remove not used label field

* remove incorrect placeholder

Co-authored-by: Erik Sundell <erik.sundell87@gmail.com>

pkg/tsdb/cloudwatch/response_parser.go

@@ -62,7 +62,6 @@ func aggregateResponse(getMetricDataOutputs []*cloudwatch.GetMetricDataOutput) m
 		}
 		for _, r := range gmdo.MetricDataResults {
 			id := *r.Id
-			label := *r.Label
 
 			response := newQueryRowResponse()
 			if _, exists := responseByID[id]; exists {
@@ -75,11 +74,7 @@ func aggregateResponse(getMetricDataOutputs []*cloudwatch.GetMetricDataOutput) m
 				}
 			}
 
-			if _, exists := response.Metrics[label]; !exists {
-				response.addMetricDataResult(r)
-			} else {
-				response.appendTimeSeries(r)
-			}
+			response.addMetricDataResult(r)
 
 			for code := range errorCodes {
 				if _, exists := response.ErrorCodes[code]; exists {
@@ -120,8 +115,8 @@ func getLabels(cloudwatchLabel string, query *cloudWatchQuery) data.Labels {
 func buildDataFrames(startTime time.Time, endTime time.Time, aggregatedResponse queryRowResponse,
 	query *cloudWatchQuery, dynamicLabelEnabled bool) (data.Frames, error) {
 	frames := data.Frames{}
-	for _, label := range aggregatedResponse.Labels {
-		metric := aggregatedResponse.Metrics[label]
+	for _, metric := range aggregatedResponse.Metrics {
+		label := *metric.Label
 
 		deepLink, err := query.buildDeepLink(startTime, endTime)
 		if err != nil {