[Microsoft.Sql/servers/databases@2023-08-01-preview]: properties.elasticPoolId is inaccurate when using what-if

### Resource Type

Microsoft.Sql/servers/databases

### Api Version

2023-08-01-preview

### Issue Type

Other

### Other Notes

When using `what-if` for the initial creation, `properties.elasticPoolId` is missing.

```
+ Microsoft.Sql/servers/.../databases/foo [2023-08-01-preview]

apiVersion: "2023-08-01-preview"
id: "/subscriptions/.../resourceGroups/.../providers/Microsoft.Sql/servers/.../databases/foo"
location: "westeurope"
name: "foo"
type: "Microsoft.Sql/servers/databases"
```

When using `what-if` for subsequent updates, `properties.elasticPoolId` is marked as Noeffect.

```
= Microsoft.Sql/servers/.../databases/foo [2023-08-01-preview]
x properties.elasticPoolId: "/subscriptions/.../resourceGroups/.../providers/Microsoft.Sql/servers/.../elasticPools/..."
```

### Bicep Repro

```bicep
resource database 'Microsoft.Sql/servers/databases@2023-08-01-preview' = {
name: 'foo'
parent: sqlServer
location: defaultLocation
properties: {
elasticPoolId: elasticPool.id
}
}
```

### Confirm

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

Start with the Bicep reproduction and the Microsoft.Sql/servers/databases@2023-08-01-preview type definition. Run what-if for both initial creation and a subsequent update, then trace how properties.elasticPoolId is represented in each result. Done means the property is present for creation and is not incorrectly marked Noeffect for updates.

Written by the indexing model from the issue text.