Fixing ReadyRoomEmbryo collision size, Switch to the CompMod style of modifying kTechData

BuildTechData was getting called before CHUD_ReadyRoom.lua was being loaded, so the changes were not making it in causing jittery movement for ReadyRoomEmbryo's and ReadyRoomExo's

Changed the extents for the ReadyRoomEmbryo to match ReadyRoomPlayer to try to ensure the "giant egg" bug sticks around, and to prevent having the camera clip through walls.