[aws-eks] eks.Cluster.addAutoScalingGroup is not a function when called from another stack

[moatazelmasry2]

So I'm creating the eks cluster in stack1 and trying to add an ASG in stack2 to that cluster. The Cluster is being loaded into stack2 using eks.Cluster.fromClusterAttributes()

Reproduction Steps

const vpc = ec2.Vpc(this, "vpc")
const eks = eks.Cluser(this,"EKS", {vpc: vpc}

const vpc = ec2.Vpc.fromVpcAttributes(this, 'VPC1Default', {
            vpcId: "vpcid-xxxx",
            availabilityZones: ['eu-central-1a', 'eu-central-1b', 'eu-central-1c'],
            vpcCidrBlock: "xxxxx"
            publicSubnetIds: [ "subnet1id", "subnet2id", "subnet3id", ]
        })
        //
        const eksCluster = eks.Cluster.fromClusterAttributes(this, "Cluster", {
            clusterArn: "arn::xxx",
            clusterName: "somename",
            vpc: vpc,
            securityGroups: [],
            clusterCertificateAuthorityData: "",
            clusterEndpoint: ""
        }) as eks.Cluster
eksCluster.addAutoScalingGroup(onDemandASG, {

        })

Error Log

cdk synth produces the following error:
eksCluster.addAutoScalingGroup is not a function

Environment

• CLI Version : 1.17.7
• Framework Version: 1.22.0 (build 309ac1b)

Other

Obliviously if I put everything into one stack, things work. But this is quite irritating, since one file tends to grow too big too fast

---

This is 🐛 Bug Report

[eladb]

The fromClusterAttributes returns an object that implements ICluster and not a Cluster class. There are some things that you currently cannot do with imported clusters,. such as adding auto scaling groups.

Related to #8608