Dedicated server exports don't perform any rendering, so there's no point
in including baked shaders. Doing so saves a few MBs in PCK size if the
shader baker was enabled in the export options.
Metal Support contributed by Migeran (https://migeran.com) and Stuart Carnie.
Co-authored-by: Stuart Carnie <stuart.carnie@gmail.com>
Co-authored-by: Gergely Kis <gergely.kis@migeran.com>