Type generation should add subfields to Spec and Status

[maqiuyujoyce]

Checklist

• I did not find a related open enhancement request.
• I understand that enhancement requests filed in the GitHub repository are by default low priority.
• If this request is time-sensitive, I have submitted a corresponding issue with GCP support.

Describe the feature or resource

In the step when we generate the types, the tool can't add subfields to generated Spec and Status of the resource type.

It'll save us a lot of effort when we support resources containing many fields if we do have this functionality.

Additional information

No response

Importance

No response

[jingyih]

This appears to be related to @jasonvigil's work on improving the type generator.

/cc @jasonvigil