[PoC] use pytest configuration file

[pmeier]

This is #3082 with an added pytest configuration as suggested in pmeier/pytest-results-action#9 (comment).

[pytorch-bot]

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❌ 8 New Failures

As of commit 7eed7af:

NEW FAILURES - The following jobs have failed:

• build (3.10, 11.8) / Build doc (gh)
• build (3.8) (gh)
• Stylecheck (gh)
• tests (3.10) / linux-job (gh)
• tests (3.8) / linux-job (gh)
• tests (3.9) / linux-job (gh)
• unittests-windows-cpu / windows-job (gh)
• unittests-windows-gpu / windows-job (gh)

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