feat: check if ScaleTargetRef is possible option

Signed-off-by: Matthis Holleville <matthish29@gmail.com>

pkg/analyzer/hpaAnalyzer.go

@@ -48,6 +48,8 @@ func AnalyzeHpa(ctx context.Context, config *AnalysisConfiguration, client *kube
 			if err != nil {
 				scaleTargetRefNotFound = true
 			}
+		default:
+			failures = append(failures, fmt.Sprintf("HorizontalPodAutoscaler uses %s as ScaleTargetRef which does not possible option.", scaleTargetRef.Kind))
 		}
 
 		if scaleTargetRefNotFound {