xla

b9d91033 - Update CUDA ver to 11.7.0 (#4584)

Update CUDA ver to 11.7.0 (#4584) * 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