apiextensions release v3.40.0

Added

• Add ClusterNames field to ETCDBackup.spec to allow backing up specific clusters within an MC.
• Add a few new fields in ETCDBackup.status to give better visibility on the state of the backup.

Changed

• Replaced gopkg.in/yaml.v2 versions below v2.2.8 with v2.2.8 to mitigate CVE-2019-11254

Removed

• Remove generated typed clients.
• Move Release API into release-operator.
• Move Config API into config-controller.
• Move Silence API into silence-operator.
• Move application.giantswarm.io API group into apiextensions-application.

Fixed

• Fix color output during makefile execution.