Add configuration for bazel

[Steboss]

This PR adds bazel's configuration step directly in the JAX container, so developers won't have to run it.
In particular, this is to avoid having devs experiencing problems such as:

RROR: /opt/xla/xla/service/gpu/kernels/BUILD:170:19: Compiling xla/service/gpu/kernels/topk_kernel_float.cu.cc failed: (Exit 1): crosstool_wrapper_driver_is_not_gcc failed: error executing command (from target //xla/service/gpu/kernels:topk_kernel_gpu_cuda) external/local_config_cuda/crosstool/clang/bin/crosstool_wrapper_driver_is_not_gcc -MD -MF bazel-out/k8-opt/bin/xla/service/gpu/kernels/_objs/topk_kernel_gpu_cuda/topk_kernel_float.cu.d ... (remaining 207 arguments skipped)
/root/.cache/bazel/_bazel_root/172c56c881f24dddf5d15d4e92df59d7/execroot/xla/external/local_config_cuda/crosstool/clang/bin/crosstool_wrapper_driver_is_not_gcc:227: SyntaxWarning: invalid escape sequence '\.'
  re.search('\.cpp$|\.cc$|\.c$|\.cxx$|\.C$', f)]
nvcc fatal   : Unsupported gpu architecture 'compute_100'
Target //xla/tools/multihost_hlo_runner:hlo_runner_main failed to build
Use --verbose_failures to see the command lines of failed build steps.

As @sergachev suggested, this problem can be solved by running the configuration with clang as:
``python /opt/xla/configure.py --backend cuda --cuda_compiler clang`