Fixed issue with incorrect .ini defintions in XComGameData.ini

Fixed Salarian Engineers not deploying drones due to previous update.

Updated so Drone Deploy ability properly checks how many drone items a soldier has.

Updated weapons content package

Salarian enemies can no longer be followers to other salarians.

Fixed drone item being infinitly usable by XCOM.

Drones can now evac when used by XCOM.

Drone deployable now scales what drone it spawns, depending on the tech level of the armour the soldier is wearing.

Fixed salarians not having proper difficulty adjustments.

Salarian Engineers are now supported followers of every advent and alien enemy, included modded ones.

Fixed issue where Salarians wouldn't spawn drones as intended. Also added catch in case they somehow can't spawn a drone at reveal (they will try to do so every turn if it hasn't been used yet)