1. Fix Nurgle's new garrsion buildings.
2. Buff high-elven gates and empire forts when controlled by owner factions.
3. Add back initial supply bonus for major settlement defensive buildings

Add initial supplies to beastmen herdstone buildings

- Small changes to the script, now when reinforcing an ally army that's defending a siege battle, the ally army should correctly build defensive buildings and barricades at the beginning of the battle.

- Lowered public order bonus of defensive buildings.

v2.4.0