Add storage fill test (#3352)
Add storage fill test (#3352)

Validates amounts (useful) and prototypes (less useful given SpawnEntityTest exists)

Co-authored-by: Metal Gear Sloth <5a6002283f4d0ed17bed24ee1f9d131baf85176c@gmail.com>
space-wizards/space-station-14,space-wizards/space-station-14,space-wizards/space-station-14,space-wizards/space-station-14,space-wizards/space-station-14,space-wizards/space-station-14