something i noticed when listening to the music that is in the music folder of the game,

Track 22 and 23 aren't from Maui Mallard in Cold Shadow at all they are from Toy Story 1 PC (same game as the one on SNES and Sega Mega Drive but lacks the wolf3d-like stage)

is GOG working with Disney for a re-release of Toy Story 1 and did these 2 music files end up in the music folder by accident or did the original game disc contain these 2 music files?

i don't know since the physical version i have of Maui Mallard in Cold Shadow is the Disney Classic Video Games 2 collection version where it's called "Donald Duck in Cold Shadow" and the 2nd game on that collection is Toy Story 1 PC (3rd game being one of those old win9x Timon and Pumbaa games)

AFAIK, the original PC release had a demo for Toy Story 1 and tracks 22/23 are indeed for this disc.
It's not like GOG is working on bringing that game, it's just that whoever extracted the audio tracks didn't exclude those to convert to OGG.