Add acceptance tests for prerelease validation

[trumant]

It would be helpful to create and manage actual repositories meant for acceptance testing.

Example repositories/tests:

• Empty repository created with GitHub defaults : acceptance testing validates that the expected 2-4 controls pass
• Example repository that meets all Level 1 controls : acceptance testing validates all level 1 controls pass

Ideally the configuration and contents of these test-specific repositories are managed with infrastructure as code and CI