[pylint] Add allow-dunder-method-names setting for bad-dunder-method-name (PLW3201)

[ThiefMaster]

closes #8732

I noticed that the reference to the setting in the rule docs doesn't work, but there seem to be something wrong with pylint settings in general in the docs - the "For related settings, see ...." is also missing there.

[github-actions]

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

✅ ecosystem check detected no linter changes.

[zanieb]

The related settings section is generated on build e.g.

ruff/crates/ruff_dev/src/generate_docs.rs

Lines 100 to 125 in 14e65af

	for line in documentation.split_inclusive('\n') {
	if line.starts_with("## ") {
	in_options = line == "## Options\n";
	} else if in_options {
	if let Some(rest) = line.strip_prefix("- `") {
	let option = rest.trim_end().trim_end_matches('`');
	match Options::metadata().find(option) {
	Some(OptionEntry::Field(field)) => {
	if field.deprecated.is_some() {
	eprintln!("Rule {rule_name} references deprecated option {option}.");
	}
	}
	Some(_) => {}
	None => {
	panic!("Unknown option {option} referenced by rule {rule_name}");
	}
	}
	let anchor = option.replace('.', "-");
	out.push_str(&format!("- [`{option}`][{option}]\n"));
	after.push_str(&format!("[{option}]: ../settings.md#{anchor}\n"));
	continue;
	}
	}

[ThiefMaster]

Huh, I thought I executed that script. anyway, that indeed fixed the problem of the broken linking. Still no idea why the link from the rules page to the settings page isn't generated, but that's unrelated to this PR anyway..

[charliermarsh]

Thanks!