Pipeline Graph Structural Update: Update Rspec Tests

What does this MR do?

Update Rspec tests to work with the new setup.

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.

Related to #276949 (closed), #293638 (closed)