4004 Check in regenerated C++ example registrants (cla: yes, waiting for tree to go green, p: path_provider, p: url_launcher, p: shared_preferences, platform-windows, platform-linux)

4015 Enable linting of macOS podspecs (cla: yes, p: path_provider, p: url_launcher, p: package_info, p: shared_preferences, p: connectivity, platform-macos)