[Microsoft.CognitiveServices/accounts/deployments@2023-10-01-preview]: The property "dynamicThrottlingEnabled" is read-only.

### Resource Type

Microsoft.CognitiveServices/accounts/deployments

### Api Version

2023-10-01-preview

### Issue Type

Property(s) inaccurately marked read-only/write-only

### Other Notes

_No response_

### Bicep Repro

```
resource openaiDeployment 'Microsoft.CognitiveServices/accounts/deployments@2023-10-01-preview' = {
name: name
sku: {
capacity: 50
name: 'Standard'
}
parent: openai
properties: {
currentCapacity: 50
model: {
format: 'OpenAI'
name: modelName
version: modelVersion
}
dynamicThrottlingEnabled: true // this is being flagged as readonly but it isn't.
raiPolicyName: 'Microsoft.Default'
versionUpgradeOption: 'OnceCurrentVersionExpired'
}
}
```

### Confirm

- [X] I have read the troubleshooting guide and looked for duplicates.

Start with the Microsoft.CognitiveServices/accounts/deployments resource at API version 2023-10-01-preview and inspect how dynamicThrottlingEnabled is represented in the Bicep type definitions. Done means the property is accepted as writable in the supplied deployment example without being flagged as read-only.

Written by the indexing model from the issue text.