(apigateway): setting deployOptions metricsEnabled causes throttling properties to be set to default values.

### Describe the bug

When creating an API Gateway resource with stage [setting](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_apigateway.CfnDeployment.MethodSettingProperty.html) (`deployOptions`), `metricsEnabled: true`, throttling is enabled with default values (`throttlingBurstLimit: 5000`, `throttlingRateLimit: 10000.0`) even though those properties are omitted.

Related: https://github.com/aws/aws-cdk/issues/20860

### Expected Behavior

I expect to be able to set `metricsEnabled`, and omit `throttlingBurstLimit` and `throttlingRateLimit` (in deployOptions) and throttling is _not_ enabled on the API gateway stage.
**OR**
I can set the values, `throttlingBurstLimit: -1` and `throttlingRateLimit: -1.0` to explicitly disable throttling (this is how they are reported from AWS CLI when throttling is disabled, but CloudFormation rejects those values).

### Current Behavior

When a new API Gateway is created with `metricsEnabled: true`, the 'prod' stage has throttling enabled with the values, `throttlingBurstLimit: 5000`; `throttlingRateLimit: 10000.0`

### Reproduction Steps

Create a new API Gateway using the code block,

```
const api = new apigateway.RestApi(this, "blarn-api", {
endpointConfiguration: {
types: [ apigateway.EndpointType.REGIONAL ]
},
restApiName: "foo",
deployOptions: {
methodOptions: {
'/*/*': {
loggingLevel: apigateway.MethodLoggingLevel.OFF,
metricsEnabled: true,
}
}
}
})
```

### Possible Solution

_No response_

### Additional Information/Context

_No response_

### CDK CLI Version

2.33.0 (build 859272d)

### Framework Version

_No response_

### Node.js Version

v18.6.0

### OS

Ubuntu 20.04.4 LTS

### Language

Typescript

### Language Version

_No response_

### Other information

_No response_

Start with the deployOptions.methodOptions entry point and reproduce the issue using the TypeScript example. Inspect the generated API Gateway stage method settings and add a regression test covering metricsEnabled with omitted throttling values. Done means enabling metrics no longer applies the 5000 and 10000 default throttling values, or the documented explicit disabling behavior works.

Written by the indexing model from the issue text.