[Feature] Add Dynamic Workload Scheduler example to GKE Batch Reference Architecture

[alizaidis]

Feature request: Add Dynamic Workload Scheduler (https://cloud.google.com/blog/products/compute/introducing-dynamic-workload-scheduler) example to GKE Batch Reference Architecture. GCP docs have a published example (https://cloud.google.com/kubernetes-engine/docs/how-to/provisioningrequest) showing how to run GPUs for batch workloads using ProvisioningRequest.