feat(eks): Addon support configurationValues (#34061)

### Issue # (if applicable)

Closes #34001

### Description of changes
`Addon` support configurationValues, both v1 and v2

### Description of how you validated changes
Unit + Integ

### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: phuhung273

packages/@aws-cdk-testing/framework-integ/test/aws-eks/test/integ.eks-addon.js.snapshot/EksClusterWithAddonStack.assets.json

@@ -526,9 +526,9 @@
      "S3Bucket": {
       "Fn::Sub": "cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}"
      },
-     "S3Key": "9953ad4c3e84d120643ece4b2e51caf43fd9850063641b4d78bf30fbe6b4d381.zip"
+     "S3Key": "6094cb0ff874f89ab5ab24fb6b9417df0fdeb6966645f90c88ec1d7e28130112.zip"
     },
-    "Description": "/opt/kubectl/kubectl 1.30; /opt/helm/helm 3.17.1",
+    "Description": "/opt/kubectl/kubectl 1.32.3; /opt/helm/helm 3.17.2",
     "LicenseInfo": "Apache-2.0"
    }
   },
@@ -849,7 +849,7 @@
      ]
     },
     "Config": {
-     "version": "1.30",
+     "version": "1.32",
      "roleArn": {
       "Fn::GetAtt": [
        "ClusterRoleFA261979",
@@ -1157,6 +1157,7 @@
     "ClusterName": {
      "Ref": "Cluster9EE0221C"
     },
+    "ConfigurationValues": "{\"replicaCount\":2}",
     "PreserveOnDelete": true
    }
   }

packages/@aws-cdk-testing/framework-integ/test/aws-eks/test/integ.eks-addon.js.snapshot/EksClusterWithAddonStack.template.json

@@ -11,13 +11,16 @@ class EksClusterStack extends Stack {
     const vpc = new ec2.Vpc(this, 'Vpc', { natGateways: 1 });
     const cluster = new eks.Cluster(this, 'Cluster', {
       vpc,
-      ...getClusterVersionConfig(this, eks.KubernetesVersion.V1_30),
+      ...getClusterVersionConfig(this, eks.KubernetesVersion.V1_32),
     });
 
     new eks.Addon(this, 'Addon', {
       addonName: 'coredns',
       cluster,
       preserveOnDelete: true,
+      configurationValues: {
+        replicaCount: 2,
+      },
     });
   }
 }

packages/@aws-cdk-testing/framework-integ/test/aws-eks/test/integ.eks-addon.js.snapshot/asset.12157b27d30ab71eb24ae65825f672ba5cc2c09dbb1703cd7adfcff3aeaca136.zip

@@ -1079,10 +1079,13 @@ declare const cluster: eks.Cluster;
 
 new eks.Addon(this, 'Addon', {
   cluster,
-  addonName: 'aws-guardduty-agent',
-  addonVersion: 'v1.6.1',
+  addonName: 'coredns',
+  addonVersion: 'v1.11.4-eksbuild.2',
   // whether to preserve the add-on software on your cluster but Amazon EKS stops managing any settings for the add-on.
   preserveOnDelete: false,
+  configurationValues: {
+    replicaCount: 2,
+  },
 });
 ```
 

packages/@aws-cdk-testing/framework-integ/test/aws-eks/test/integ.eks-addon.js.snapshot/asset.6094cb0ff874f89ab5ab24fb6b9417df0fdeb6966645f90c88ec1d7e28130112.zip

@@ -49,6 +49,13 @@ export interface AddonProps {
    * @default true
    */
   readonly preserveOnDelete?: boolean;
+
+  /**
+   * The configuration values for the Add-on.
+   *
+   * @default - Use default configuration.
+   */
+  readonly configurationValues?: Record<string, any>;
 }
 
 /**
@@ -144,6 +151,7 @@ export class Addon extends Resource implements IAddon {
       clusterName: this.clusterName,
       addonVersion: props.addonVersion,
       preserveOnDelete: props.preserveOnDelete,
+      configurationValues: this.stack.toJsonString(props.configurationValues),
     });
 
     this.addonName = this.getResourceNameAttribute(resource.ref);