Better Airdrop Production

This change allows the Production class and its children to take in multiple actors to be produced.
This is needed for #7055 so that the units produced can exit in an orderly fashion.
I think the move out of the way isnt acctually an attack move but that aside, first its attack move because all the orher production buildings do the attack move second it makes sense if you are rallypointing them accross the map.