pudge, bloodseeker, nyx assassin, earthshaker, necro, axe, shadow fiend tweaks

pudge fixes

fix to enemies AFKing after killing an allied unit

forgot to add the fix to bloodseeker bloodrage griefing

fixes to armlet and vlads lifesteal
nerfs to significant winrate outliers axe and necrophos

fixed asura round

granite golem hotfix

## General
- Boss health reduced by 25% across the board.
- Difficulty HP scaling from 0/50/100/150% to 0/20/40/60%
- Boss attack damage scaling from 0/15/30/45% to 0/20/40/60%
- Ability difficulty scaling more aggressive, Normal spells have higher cooldowns and lower values, Nightmare spells have about half the cooldown and double the values (on average, not all boss spells adhere to this)

fix to lifesteal values on satanic line
various bloodseeker fixes

hotfix to bristleback