Test garbage collection test in pipeline

What does this MR do?

This MR implements:

• A test for running the online garbage collection tool
• Imports the Container Registry project to a new project so it can use the tool
• Sets the default branch to online-gc-test-builder-poc as a temporary solution while the tool is on POC

Considerations:

• This test runs only in preprod since the feature is only enabled in this environment
• To validate this test no qa-selectors where used since they are not deployed in the preprod environment. This will need a follow-up MR to update the selectors once they are deployed in the views.
• The test requires a long time to run and will not be a part of the main test suite (reliable and smoke) that runs as a part of the deployment path. Due to its time constraints, it will run on a separate schedule.
• The tool requires the Container Registry repository because it needs to generate layers, manifests and other necessary pieces for an online garbage collection scenario

More context:

• Test online garbage collection on pre-prod