Controller 4.4.0, AAP 2.4
Add node_type to instance info
https://github.com/ansible/awx/pull/13408
https://github.com/ansible/awx/pull/13176
It's varchar(16): https://github.com/ansible/awx/blob/1e690fcd7f2854dda493722f0084a4f22758823b/awx/main/models/ha.py#L156