Summary:
Fix the instance_type create call
Original Commit - https://github.com/yugabyte/yugabyte-db/commit/e944b3c7248508319cd8f1c0e359940a443b98b5
Depends on - D40008

Test Plan:
Provisioned node using YNP
Created another node with different instance.
Ensured registeration is complete.

Reviewers: anijhawan, skhilar

Subscribers: yugaware

Differential Revision: https://phorge.dev.yugabyte.com/D40010