Fix CUDA checkpoint restore args and generated API docs

[kkraus14]

Summary

• Fix CUDA checkpoint restore argument generation across the CUDA 12.9, 13.2, and 13.3 header layouts, including the CUDA 13.3 sizeof(...) reserved-field spelling that caused CUcheckpointRestoreArgs to disappear.
• Carry parsed struct member type and array-length metadata into the generated driver templates so CUcheckpointRestoreArgs_st and related checkpoint structs are emitted with the correct fields.
• Regenerate CUDA 13.3 bindings from the updated cybind legacy cython generator (0.3.1.dev1711+g9f37ce73) so the generated files capture the fixed generator commit for traceability.
• Refresh the generated cuda.bindings API docs and remove the temporary conf.py docstring sanitizer now that cybind emits docstrings that Sphinx can parse directly.

Validation

• Parsed/rendered CUDA header snapshots for CUDA 12.9, 13.2, and 13.3; CUcheckpointRestoreArgs is present in all three and the generated layouts match the corresponding headers.
• Checked the CUDA 13.2 vs 13.3 cuda.h checkpoint structs, sizeof(...) array expressions, and empty named structs; no additional checkpoint struct breakages were found.
• Confirmed the generated CUDA 13.3 code matches regeneration from the updated cybind generator.
• python -m py_compile cuda_bindings/docs/source/conf.py
• Pre-commit hooks passed during commit.
• PR docs job completed successfully and deployed the preview. The live driver docs render CUcheckpointRestoreArgs, its fields, and cuCheckpointProcessRestore links as API objects, with no raw .. attribute::, .. method::, :param, :rtype, or code-block:: text artifacts in the generated module pages.

Notes

• The docs build still has pre-existing/generated-doc warnings unrelated to the restored API rendering. The warning spike is from Sphinx now parsing generated docstrings as RST rather than displaying them as literal blocks; follow-up cleanup should happen in cybind generation rather than reintroducing the conf.py sanitizer.

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[kkraus14]

/ok to test

[github-actions]

Doc Preview CI
🚀 View preview at https://nvidia.github.io/cuda-python/pr-preview/pr-2144/
https://nvidia.github.io/cuda-python/pr-preview/pr-2144/cuda-core/
https://nvidia.github.io/cuda-python/pr-preview/pr-2144/cuda-bindings/
https://nvidia.github.io/cuda-python/pr-preview/pr-2144/cuda-pathfinder/
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[rparolin]

LGTM. Clean fix for the CUDA 13.3 header parsing break.

[kkraus14]

/ok to test