-last sprite improvement for eternal wraith outside of downpour and dross

-fixed the sprite of eternal wraith outside of downpour and dross

-added a eternal horf to eternal wraith to fix an inconsistency of being the only eternal gaper type in first chapter that couldn't spawn an eternal horf on death
-added to eternal bone fly an indicator that the bone that it shoots can split
-fixed eternal gusher from eternal wraith not having extra scale

-reworked eternal wraith and added a dross sprite to him
-eternal tainted mulligan now shoots at all directions if the player is approaching it too much
-a nerf to eternal holy bony, now shoots 3 bones at once instead of 4
-a nerf to eternal candler, it now has a chance to repeat the attack instead of always repeating the attack
-a nerf to eternal blue baby (boss), his homing projectiles are less aggressive now
-added some visual effects when eternal mother's shadow is attracting the player
-flies spawned by eternal hush have the eternal color now
-fixed some eternal enemies not flipping their sprites when they should do that
-fixed vanishing twin copying eternal isaac, eternal ??? and eternal hush
-fixed eternal enemies spawned by another enemies dropping rewards
-some code improvement

-fixed some major bosses still becoming eternal if the function that enable eternal bosses is disabled

-just small update to some callbacks to avoid conflict between then

-improved eternal satan sprite and animation
-added eternal grub
-increased the hp of eternal peeping fatty from 120 to 180

-added a variant of the new attack of eternal mega satan to not start always from left to right anymore

-improved the timing of the new attack of eternal mega satan

-reworked what eternal soul sucker do on death
-reworked the brimstone attack of eternal mega satan