GKE now automatically applies protection tier labels to TPU node pools created from Compute Engine reservations

## Feature Feature GKE now automatically applies protection tier labels to TPU node pools created from Compute Engine reservations. Depending on your configuration, GKE adds: * Node pool resource label: `goog-gke-node-pool-protection-tier` (`standard` or `capacity_optimized`) * Kubernetes node label: `cloud.google.com/protection-tier` (`STANDARD` or `CAPACITY_OPTIMIZED`) To learn more, see [Automatically applied labels](https://cloud.google.com/kubernetes-engine/docs/how-to/creating-managing-labels#automatically-applied-labels).