fix to valve breaking the game

forgot to disable nyx again

Nyx Assassin and Sniper are upcoming, what hero should get facet reworks afterwards?
https://strawpoll.com/wby5QYKJ8yA

fixed gyrocopter homing missile and flak cannon, no longer needs to turn to cast during flight of the valkyrie
fixed eblade tier 5 not amping spell damage
fixed sf raze and ember spirit sleight
fixed hoodwink ult not releasing early and talents

forgot to disable nyx xd

hotfixes to gyrocopter behavior i didn't realize during dev time
fixed necro ult benefitting from spell amp.

gyrocopter rework with 2 facets
https://yahnich.github.io/ for details

temporarily removed gyrocopter, sniper and nyx assassin for ceremonial reasons
reduced armor and health of butcher wave

reduced winter wyvern lich spawn rate from 20s to 35s
reduced winter wyvern apparition spawn rate from 35s to 50s

fixed max hp abilities benefitting from spell amplification
fixed the game always assuming there are 5 heroes in the game, making solo games significantly harder

tweaked down health values on golem, leshrac and winter wyvern waves

MMR is reenabled