Add retriever config for acceptance tests

What does this MR do?

Adds default GitLab retriever configuration to acceptance tests reducing execution time from ~30s to ~21s locally. In CI test execution is reduced from ~19s to ~10s

TODO

• Added the Changelog (e.g. Changelog: feature) trailer to the commits that need to be included in the changelog
• Added unit tests (if required)
• Added acceptance tests (if required)
• Documentation (if required)
• Code review guidelines
• Go Style guidelines