Function cargo::util::lints::verify_feature_enabled

fn verify_feature_enabled(
    lint_name: &str,
    feature_gate: &Feature,
    manifest: &Manifest,
    manifest_path: &str,
    ws_contents: &str,
    ws_document: &ImDocument<String>,
    ws_path: &str,
    error_count: &mut usize,
    gctx: &GlobalContext,
) -> CargoResult<()>