
Automatic merge from submit-queue (batch tested with PRs 41931, 39821, 41841, 42197, 42195) Adding legacy ABAC for 1.6 This is a fork of a previous [pull request](https://github.com/kubernetes/kubernetes/pull/42014) to include feedback as the original author is unavailable. Adds a mechanism to optionally enable legacy abac for 1.6 to provide a migration path for existing users.
Container-VM Image
Container-VM Image is a container-optimized OS image for the Google Cloud Platform (GCP). It is primarily for running Google services on GCP. Unlike the open preview version of container-vm, the new Container-VM Image is based on the open source ChromiumOS project, allowing us greater control over the build management, security compliance, and customizations for GCP.