xla

a497db46 - Update cuda 11.7 (#4587)

Update cuda 11.7 (#4587) * Use nvidia/cuda:11.7.0-cudnn8-devel-ubuntu18.04 in CI * Change default CUDA image tag: 11.7.0-cudnn8-devel-ubuntu18.04 * Push new xla base image to upstream * rebase, update TF pin to that of master