remove need wait

Signed-off-by: nolouch <[email protected]>

client/resource_group/controller/controller.go

@@ -1303,7 +1303,14 @@ func (gc *groupCostController) onResponse(
 		case rmpb.GroupMode_RUMode:
 			for typ, counter := range gc.run.requestUnitTokens {
 				if v := getRUValueFromConsumption(delta, typ); v > 0 {
-					counter.limiter.RemoveTokens(time.Now(), v)
+					// counter.limiter.RemoveTokens(time.Now(), v)
+					now := time.Now()
+					res := counter.limiter.Reserve(context.Background(), gc.mainCfg.LTBMaxWaitDuration, now, v)
+					if d, err := WaitReservations(context.Background(), now, []*Reservation{res}); err != nil {
+						return nil, err
+					} else {
+						gc.successfulRequestDuration.Observe(d.Seconds())
+					}
 				}
 			}
 		}