Allows building TFRT with --config=nvcc, irrespective of the host compiler.
Allows building TFRT with --config=nvcc, irrespective of the host compiler.

These should work now (options marked with `[]` are defaults and don't need to be specified):

bazel build [--config=clang]                 ... # clang host, clang device
bazel build [--config=clang]  --config=nvcc  ... # clang host, nvcc device
bazel build  --config=gcc    [--config=nvcc] ... # gcc host, nvcc device

Addresses issue reported in https://github.com/tensorflow/runtime/issues/41.

PiperOrigin-RevId: 366229661

tensorflow/runtime,tensorflow/runtime,tensorflow/runtime,tensorflow/runtime