Co-authored-by: serprex <159546+serprex@users.noreply.github.com>

Spawn/despawn Ivan immediately (not on next scene)

Move Ivan’s boomerang code out of z_player.c

Change Actor_SpawnEntry to use VB
Move adult zelda collapse stalfos to a explicit hook
Move dark link to a explicit hook
Some more canRandomize that were not needed
Move bg_haka & bg_haka_tubo to explicit hooks
Move en_vali to an explicit hook
Move bg_mori_bigst to an explicit hook
Fix door opening before the enemies are killed
Remove `canRandomize` parameter
Move bg_haka_huta to explicit hooks