Add K3d local cluster support
What does this MR do?
- Install K3d (40Mb) in the specs container
- Add ApplicationSettings module to interact with GitLab Application Settings
k3dprovider dependency check to ensure that the application setting
allow_local_requests_from_web_hooks_and_servicesis set to
true(required for GitLab to interact with local k3d cluster)
Does this MR meet the acceptance criteria?
- [-] Changelog entry
- Documentation (if required)
- Code review guidelines
- Merge request performance guidelines
- Style guides
- [-] Database guides
- [-] Separation of EE specific content