Fix CUDA/cuDNN DLL preload paths for CUDA 13 consolidated wheel layout

[tianleiwu]

Description

Fix #29198.

NVIDIA restructured the CUDA Python wheels starting with CUDA 13: the per-component CUDA Toolkit packages (cublas, cufft, cuda_runtime, cuda_nvrtc, curand, ...) were consolidated into a single nvidia/cu{major} package and the -cuNN suffix was dropped from those package names. This PR updates the DLL/shared-library preload logic and the wheel dependency metadata so onnxruntime-gpu (and onnxruntime-trt-rtx) keep working on both the legacy CUDA 12 layout and the new CUDA 13 consolidated layout.

Summary of Changes

Preload logic (onnxruntime/__init__.py)

File	Change
onnxruntime/__init__.py	_get_nvidia_dll_paths now detects the CUDA 13+ consolidated layout and resolves CUDA libraries under nvidia/cu{major} — Windows uses an architecture sub-folder (bin/<arch>, e.g. bin/x86_64), Linux uses a flat lib. The legacy CUDA 12 per-component paths are preserved.
onnxruntime/__init__.py	Added build_cuda_version and arch parameters (for testability/arch override); cuDNN paths factored out since cuDNN keeps its own nvidia/cudnn package layout in both schemes.
onnxruntime/__init__.py	print_debug_info drops the -cuNN suffix from CUDA Toolkit package names for CUDA 13+ (cuDNN keeps its suffixed name).

Wheel dependency metadata (setup.py)

File	Change
setup.py	onnxruntime-gpu cuda extras drop the -cuNN suffix for CUDA 13+ (nvidia-cuda-nvrtc, nvidia-cuda-runtime, nvidia-cufft, nvidia-curand); cuDNN dependency keeps the suffixed name.
setup.py	onnxruntime-trt-rtx CUDA Runtime dependency drops the -cuNN suffix for CUDA 13+.

Tests (onnxruntime/test/python/onnxruntime_test_python_preload_dlls.py)

• New unit tests pin the expected relative paths for the CUDA 12 (legacy) and CUDA 13 (consolidated) layouts on both Windows and Linux, the Windows arch override, the Linux flat-lib layout, the unchanged cuDNN layout, and the cuda/cudnn toggles.

Testing

• Run the new tests: python -m pytest onnxruntime/test/python/onnxruntime_test_python_preload_dlls.py (or python -m unittest onnxruntime.test.python.onnxruntime_test_python_preload_dlls).
• Backward compatibility: CUDA 12 paths and the cuDNN layout are unchanged; only CUDA 13+ takes the new consolidated paths and unsuffixed package names.

Checklist

• Tests added/updated
• No breaking changes (CUDA 12 behavior preserved)
• Documentation updated (if applicable)