[BUG]: `__cccl_allocation_stream` invokes cuda-driver UB

### Is this a duplicate?

- [x] I confirmed there appear to be no [duplicate issues](https://github.com/NVIDIA/cccl/issues) for this bug and that I agree to the [Code of Conduct](CODE_OF_CONDUCT.md)

### Type of Bug

Something else

### Component

libcu++

### Describe the bug

I noticed that `cuda::__cccl_allocation_stream` holds a static-lifetime `cuda::stream`

```
inline ::cuda::stream_ref __cccl_allocation_stream()
{
static ::cuda::stream __stream{device_ref{0}};
return __stream;
}
```

The dtor (and hence `cuStreamDestroy`) will run below main. But, [quoth the documentation](https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#initialization)

> The CUDA interfaces use global state that is initialized during host program initiation and destroyed during host program termination. The CUDA runtime and driver cannot detect if this state is invalid, so using any of these interfaces (implicitly or explicitly) during program initiation or termination after main) **will result in undefined behavior.**

oops.

### How to Reproduce

n/a

### Expected behavior

No UB.

### Reproduction link

_No response_

### Operating System

_No response_

### nvidia-smi output

_No response_

### NVCC version

_No response_