(opensearchservice): must configure zone awareness settings even when i am not enabling zone awareness

### Describe the bug

When creating an opensearch domain using AWS CDK, I am getting the following error:

`Invalid request provided: You must configure zone awareness settings if you turn on zone awareness`

My CDK code is as follows:

```typescript
import * as cdk from "aws-cdk-lib";
import * as ec2 from "aws-cdk-lib/aws-ec2";
import * as opensearch from "aws-cdk-lib/aws-opensearchservice";
import { Construct } from "constructs";

export interface OpenSearchProps {
vpc: ec2.IVpc;
subnets: ec2.ISubnet[];
}

export class OpenSearch extends Construct {
constructor(scope: Construct, id: string, props: OpenSearchProps) {
super(scope, id);

...

const opensearchDomain = new opensearch.Domain(this, "Domain", {
vpc,
vpcSubnets: [
{
subnets,
},
],
securityGroups: [securityGroup],
version: opensearch.EngineVersion.OPENSEARCH_2_5,
tlsSecurityPolicy: opensearch.TLSSecurityPolicy.TLS_1_2,
enableVersionUpgrade: true,
removalPolicy: cdk.RemovalPolicy.DESTROY,
zoneAwareness: {
enabled: false,
},
capacity: {
dataNodeInstanceType: "t3.small.search",
dataNodes: 1,
},
});
}
}
```

I've also tried with omitting `zoneAwareness` altogether

### Expected Behavior

The cluster should be deployed in a single AZ

### Current Behavior

There is an error stating that zone awareness must be configured, even tho my zone awareness is set to false

### Reproduction Steps

Create a CDK stack

```typescript
export class MyStack extends cdk.Stack {
constructor(scope: Construct, id: string, props?: cdk.StackProps) {
super(scope, id, props);

// VPC
const vpcId = this.node.tryGetContext("vpcId");
const vpc = ec2.Vpc.fromLookup(this, "Vpc", { vpcId });
const subnets = vpc.privateSubnets;
const subnetIds = vpc.privateSubnets.map((subnet) => subnet.subnetId);

// OpenSearch
const opensearch = new OpenSearch(this, "OpenSearch", {
vpc,
subnets,
});

}
}
```

```typescript
import * as cdk from "aws-cdk-lib";
import * as ec2 from "aws-cdk-lib/aws-ec2";
import * as opensearch from "aws-cdk-lib/aws-opensearchservice";
import { Construct } from "constructs";

export interface OpenSearchProps {
vpc: ec2.IVpc;
subnets: ec2.ISubnet[];
}

export class OpenSearch extends Construct {
constructor(scope: Construct, id: string, props: OpenSearchProps) {
super(scope, id);

const { vpc, subnets } = props;

const securityGroup = new ec2.SecurityGroup(this, "SecurityGroup", {
vpc,
allowAllOutbound: true,
});

securityGroup.addIngressRule(
ec2.Peer.ipv4(vpc.vpcCidrBlock),
ec2.Port.tcp(9200)
);

securityGroup.addIngressRule(
ec2.Peer.ipv4(vpc.vpcCidrBlock),
ec2.Port.tcp(9300)
);

const opensearchDomain = new opensearch.Domain(this, "Domain", {
vpc,
vpcSubnets: [
{
subnets,
},
],
securityGroups: [securityGroup],
version: opensearch.EngineVersion.OPENSEARCH_2_5,
tlsSecurityPolicy: opensearch.TLSSecurityPolicy.TLS_1_2,
enableVersionUpgrade: true,
removalPolicy: cdk.RemovalPolicy.DESTROY,
zoneAwareness: {
enabled: false,
},
capacity: {
dataNodeInstanceType: "t3.small.search",
dataNodes: 1,
},
});

new cdk.CfnOutput(this, "Endpoint", {
value: opensearchDomain.domainEndpoint,
});
}
}
```

### Possible Solution

Downgrading to CDK version `2.85.0` seems to fix the problem

### Additional Information/Context

_No response_

### CDK CLI Version

2.117.0 (build 59d9b23)

### Framework Version

2.127.0

### Node.js Version

v21.6.2

### OS

macos

### Language

TypeScript

### Language Version

5.3.3

### Other information

_No response_

Reproduce the AWS CDK OpenSearch Domain configuration using the provided TypeScript examples and compare versions 2.85.0, 2.117.0, and 2.127.0. Inspect the synthesized configuration for zone awareness and confirm that the corrected behavior deploys a single-AZ domain when zone awareness is disabled.

Written by the indexing model from the issue text.