sphinx-doc__sphinx-8035

Support defining specific `:private-members:` for autodoc

Verdict: disputed: one of the two checks found quoted evidence (not counted as a flag).

For `:private-members:` to take arguments, similarly to how `:members:` currently works

Disputed: one of the two checks found a stated fix, the other found nothing. Not counted as a flag; the quote is on the task page.