Prepare move of CUDA compilation functionality
Prepare move of CUDA compilation functionality

Currently PTX to SASS compilation functions are exported by the target `stream_executor/gpu:asm_compiler`, but implemented in `stream_executor/cuda:cuda_asm_compiler`.

I'm trying to clean this up by moving everything into `:cuda_asm_compiler`. Since we can't do atomic cross cutting changes between Jaxlib and XLA, I'm only preparing `:cuda_asm_compiler` as an alias for Jaxlib to depend on.

In a subsequent change I will move all the code over.
