Move and break up unwrapping utils for sharing

What does this MR do?

What it says on the tin! Updates the unwrapping utilities for pipeline-shaped data from GraphQL so it can be shared across various Pipeline Authoring graphs.

Does this MR meet the acceptance criteria?

Conformity

• Code review guidelines
• Merge request performance guidelines
• Style guides

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.