DLL load failed on Windows with CUDA 13.0 Toolkit

## Bug Description
On Windows 11 + CUDA 13.0 + Python 3.12, `import pycuda.driver` raises
`ImportError: DLL load failed while importing _driver: The specified module could not be found.`

Even though `...\CUDA\v13.0\bin\x64` is present in the **system PATH**.

## Minimal Reproduction
1. Install **CUDA 13.0 Toolkit** (default path)
2. Verify system PATH contains `...\CUDA\v13.0\bin\x64`
3. Run the following Python code:

```python
import pycuda.driver as drv
```
Error occurs every time.

## Environment

OS Windows 11
Python 3.12
CUDA 13.0
PyCUDA 2025.1.2

## Root Cause
CUDA 13.x relocates all 64-bit runtime DLLs from bin\ to bin\x64; this layout change applies to every 13.x release including 13.1.0/13.0.2/13.0.1/13.0.0 .