feat(monitor): add reducer of AlertRecordRule (#20582)

pkg/apis/monitor/alertrecord.go

@@ -96,4 +96,5 @@ type AlertRecordRule struct {
 	ConditionType string `json:"condition_type"`
 	// 静默期
 	SilentPeriod string `json:"silent_period"`
+	Reducer      string `json:"reducer"`
 }

pkg/monitor/alerting/rule.go

@@ -191,6 +191,7 @@ func newRuleDescription(rule *Rule, alertDetails *monitor.CommonAlertMetricDetai
 			Comparator:      alertDetails.Comparator,
 			Threshold:       RationalizeValueFromUnit(alertDetails.Threshold, alertDetails.FieldDescription.Unit, ""),
 			ConditionType:   alertDetails.ConditionType,
+			Reducer:         alertDetails.Reduce,
 		},
 	}
 	if len(ruleDes.ResType) == 0 {