Get the turret path belonging to a weapon of given vehicle.
Reverse version of the weaponsTurret scripting command.
|_vehicle||a vehicle with turrets <OBJECT>|
|_weapon||a weapon in the vehicles turret STRING|
_turretPath = [cameraOn, "HMG_127_mbt"] call CBA_fnc_turretPathWeapon
Weapons turret path. [-1] for driver weapon.  when weapon not found. ARRAY