Bump docutils to 0.23

[ekanshul]

Closes #15148

Bumps the stubs to docutils 0.23 and updates them for the runtime changes in that release: Node.findall()/traverse()/next_node() accept a tuple of node classes, document gains names, create_id(), note_names() and set_duplicate_name() (replacing set_duplicate_name_id()) and set_name_id_map() is deprecated, transition.ignored_siblings, transforms.references.SectionIDs, transforms.misc.Transitions.warn(), PreambleCmds.bracket_footnoterefs, code_role()'s first parameter is renamed to role_name, and CSVTable.check_requirements() was removed. While there, get_default_settings() accepts classes as well as instances (docutils itself calls it both ways), and document.id_counter is keyed by str, not int.

Agent used: Claude Code

[github-actions]

According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉