CDK:Alarm constructor statistic prop doesn't use Cfn extendedStatistic for IQM

  new Alarm(..., {
    ...,
    metric: new Metric({
      ...,
      statistic: Stats.IQM,
    }),
  })

"ExtendedStatistic": "IQM",

"Statistic": "IQM",

import { Stack, type StackProps } from "aws-cdk-lib";
import { Alarm, ComparisonOperator, Metric, Stats } from "aws-cdk-lib/aws-cloudwatch";
import { Construct } from "constructs";

export class TestStack extends Stack {
  constructor(scope: Construct, props?: StackProps) {
    super(scope, "test-stack", props);

    new Alarm(this, "MockAlarm", {
      evaluationPeriods: 1,
      threshold: 0,
      comparisonOperator: ComparisonOperator.GREATER_THAN_THRESHOLD,
      metric: new Metric({
        namespace: "MOCK",
        metricName: "TEST",
        statistic: Stats.IQM,
      }),
    });
  }
}