Building `cuda.bindings` docs requires the presence of a physical GPU & valid driver

[leofang]

I think it's because of the Jupyter notebook:
https://github.com/NVIDIA/cuda-python/actions/runs/12523399319/job/34932966615#step:10:117
We should just save the output as opposed to rerunning it every time we build the docs.

[leofang]

Setting this to P1 because we want to minimize the usage of GPU runners.