Updated the multiple network interfaces for Pods and bundled load balancing with BGP

## Change Change Updated the [multiple network interfaces for Pods](https://cloud.google.com/kubernetes-engine/distributed-cloud/bare-metal/docs/how-to/multi-nic)and [bundled load balancing with BGP](https://cloud.google.com/kubernetes-engine/distributed-cloud/bare-metal/docs/how-to/lb-bundled-bgp)features to support admin clusters for version 1.34 or higher. Admin cluster support for these features has also been added to the GKE On-Prem API, so you can specify these features with clients like [Terraform](https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/gkeonprem%5Fbare%5Fmetal%5Fadmin%5Fcluster).