gh-51944: Add missing macOS constants to termios (#112823)

* gh-51944: Add some macOS constants to termios

This changeset adds all public constants in <termio.h>
and <sys/termios.h> on macOS that weren't present
already.

Based on the macOS 14.2 SDK

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>