multimedia/shotcut-qt6: Update to 25.01.25 "Finally, Playlist Bins"

Remove hard deps on multimedia/mlt7-glaxnimate@qt6 and
multimedia/mlt7-qt@qt6. These can be easily installed as separate
packages for additional filters, but are not required for runtime.

https://github.com/mltframework/shotcut/releases/tag/v25.01.25