Campaign Balance fixes

Map Campaigns:

• added debuff to unit survive rolls based on number of battles lost in a row
• fixed issues with displaying results of dead general death if unit also destroyed
• improvements to AI placement of reinforcement armies
• fixes to armies and allies on allies call roll display text
• exclude allies, in addition to existing exclusion of armies, reinforcing a battle from adjacent points if they are caught in a siege.
• Hard AI rerolls lower value unit selections on reinforcement
• fix player able to select second march roll on AI turns
• prioritize losing medium and light foot units on attrition rolls on sieges
• rebalance reinforcement numbers and cap to AI on hard

Misc

• fix Gallic (Middle) description