Tuning pass midtot

[Saji-Saji]

This pull request reverts several class balance hotfixes for Warlock (Affliction and Demonology specializations) and Fire Mage, returning their spell damage modifiers to pre-hotfix values as of 2026-02-02. Additionally, it adjusts the attack power scaling for a metagem effect for Hunters.

Reversion of class hotfixes:

• Affliction Warlock: Removed all recent bonus damage hotfixes for Malefic Grasp and Drain Soul, and reverted DoT effect multipliers to their original values. (sim/warlock/affliction/hotfixes.go)
• Demonology Warlock: Removed bonus damage hotfixes for Doom and Soul Fire, setting their modifiers back to 0%. (sim/warlock/demonology/hotfixes.go)
• Fire Mage: Reverted the Pyroblast direct damage bonus to 0% and reset the Combustion Ignite scaling to its original value. (sim/mage/fire/hotfixes.go)

Metagem effect adjustment:

• Increased the attack power contribution for Hunters in the metagem effect calculation by doubling the ranged attack power before applying the 0.75 coefficient. (sim/common/mop/metagems.go)