Component template missing module_type API field

NetBox version

v3.2.1

Python version

3.9

Steps to Reproduce

1. Create a new module and module components (interface, console port, etc)
2. Find the ID if said component and navigate to the API endpoint (for example GET /api/dcim/interface-templates/76/)
3. The device_type is set to null and there's no module_type field

Expected Behavior

A module_type field should be present with similar information to the device_type field.

Observed Behavior

The module_type field isn't returned on API GET calls.
it should be added under the relevant component templates' fields variable

netbox/netbox/dcim/api/serializers.py

Line 327 in 39a9eba

fields = [