Added support for google TPU

[kulikovv]

set vendor as google and ready to and proper nodeSelector

@kubernetes( image="image_name", namespace="default", service_account="my-ksa", node_selector={ "cloud.google.com/gke-tpu-accelerator": "tpu-v6e-slice", "cloud.google.com/gke-tpu-topology": "1x1" }, gpu=1, gpu_vendor="google" )

[savingoyal]

thanks for the PR! it might make more sense to introduce tpu as an arg rather than overriding gpu - since one can access gpus in gcp too. also, this approach would mimic our support for trainium.