Review slow test: `tests/test_api_build.py::test_api_build_pytorch_cpu_issue5644`

[github-actions]

Slow Test Review

Test	tests/test_api_build.py::test_api_build_pytorch_cpu_issue5644
Duration	938.973826032s
Platform	macOS
Identified	2026-07-22
Parent Epic	#6030

Task

This test has been identified as one of the slowest in the conda-build test suite.

1. Investigate why this test is slow
2. Optimize the test (see tips below) or document why it cannot be improved
3. Submit a PR with your changes
4. Close this issue when complete

Optimization tips

• Share expensive setup/teardown using fixtures
• Mock I/O, network calls, or other slow operations
• Consolidate parametrized tests where possible
• Profile the test to identify bottlenecks

Auto-generated by the slow-tests.yml workflow, see https://github.com/conda/conda-build/actions/runs/29891123154.