anndata optional dependency import system can behave poorly with autodoc_mock_imports

[Intron7]

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I ran into a problem with the new GPU dependencies and how they are loaded in anndata. For the rapids-singlecell docs I mock import all gpu packages, this includes cupy and cupyx. Because of the mock imports anndata thought it was in a GPU enviroment and tried to load the packages. The docs creation froze and didn't finish. Mock importing anndata didn't fix the issue it just resulted in a bug. What I had to do in the end is importing anndata at the start of the conf.py so that it doesn't know about cupy. If there is a more elegant solution than this please let me know.

Versions

anndata 0.10.0rc1