sg: ops, use docker API v2 endpoints

Created by: jhchabran

The internal calls were already using the V2 endpoint, but the auth still went through the v1 API. See https://www.docker.com/blog/docker-hub-v1-api-deprecation/#:~:text=Docker%20has%20planned%20to%20deprecate,repositories%20on%20September%205th%2C%202022. for the context.

Test plan

Manually tested.