Remove dependencies on instructlab/instructlab

[RobotSail]

This repository currently has dependencies on values from instructlab.configuration, which is consuming SDG.

Specifically, the utils.py is importing values from configuration that will no longer exist
with this PR in instructlab: instructlab #1471.

In general, it's a bad practice for a consuming library to depend on these values as it is a circular dependency.

SDG should either parameterize these values or have its own concept for DEFAULT_API_KEY and DEFAULT_MODEL_OLD
so as to decouple itself from the instructlab CLI in this direction.

[RobotSail]

Closing this as it seems to have already been resolved.

[russellb]

Yeah, this was just true during transition because the code that started the repo was extracted from the instructlab repo

[russellb]

#11 tracked the steps remaining