* Change most n64ddFlag checks to IS_RANDO checks
* Change most isMasterQuest checks to IS_MASTER_QUEST checks
* Change most isBossRush checks to IS_BOSS_RUSH checks
* Replace isMasterQuest & isBossRush with questId
* Replace n64ddFlag with questId
Also restore authentic n64ddFlag behavior except savefile saving/loading
* Move quest enum from file_choose.h to z64save.h
* Update macros to not take gSaveContext