Dispelling movement debuffs

[Zheneq]

Situation: Su-Ren casts Spirit Bend with Slow, Helio casts Battleforged with Unstoppable on the same target. If Unstoppable applied first, Spirit Bend just doesn't apply Slow and moves on. If Slow is applied first, Unstoppable dispels the whole Spirit Bend effect as it contains a movement debuff (and when Unstoppable wears off, the target still has Slow status but has full movement as there have been no status changes to trigger an update).

So it's a race condition resolved by actor order.

Solution 1: Allow effects to handle Unstoppable and remove movement debuff they have applied while keeping the effect itself active.
Solution 2: Effect has WillApplyStatus method which is not used in Rogues. Perhaps we can use it in ExecuteResults to resolve the race condition?

https://discord.com/channels/600425662452465701/1241828879618936893