[managedEnvironments]: "identity" property missing in type definition

### Resource Type

Microsoft.App/managedEnvironments

### Api Version

2024-03-01

### Issue Type

Missing property(s)

### Other Notes

_No response_

### Bicep Repro

```bicep
resource environmentIdentity 'Microsoft.ManagedIdentity/userAssignedIdentities@2023-01-31' = {
name: 'mgid-cae-identity-sample'
location: 'westeurope'
}

resource cae 'Microsoft.App/managedEnvironments@2024-03-01' = {
name: 'cae-identity-sample'
location: 'westeurope'
identity: {
type: 'UserAssigned'
userAssignedIdentities: {
'${environmentIdentity.id}': {}
}
}
properties: {
...
}
}
```
The `identity` assignment to the Container Apps Environment is giving me a warning which I have to disable with `#disable-next-line BCP187`:

> The property "identity" does not exist in the resource or type definition, although it might still be valid.

Following [the documentation](https://learn.microsoft.com/en-us/azure/templates/microsoft.app/2023-11-02-preview/managedenvironments?pivots=deployment-language-bicep) (where it shows `2023-11-02-preview` as `latest`, although I can deploy against version `2024-03-01` as in my sample) `identity` is available on the type and it does in fact deploy just fine.

### Confirm

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

Start by inspecting the Microsoft.App managedEnvironments type definition for API version 2024-03-01 and compare it with the linked Azure documentation and the Bicep reproduction. Done means the identity property is represented for that resource version and the sample no longer requires #disable-next-line BCP187.

Written by the indexing model from the issue text.