Remove limit for druid exactify toplist query (#4642)

runtime/queries/metricsview_comparison_toplist.go

@@ -183,6 +183,10 @@ func (q *MetricsViewComparison) executeDruidApproximateToplist(ctx context.Conte
 	q.addDimsAsFilter()
 
 	q.Measures = originalMeasures
+
+	// remove limit since we have already added filter with only toplist values and order clause will be present
+	q.Limit = 0
+
 	return q.executeToplist(ctx, olap, mv, priority, security)
 }