Allow Tile Prototypes to specify a mining result like resources

[protocol_1903]

tldr allow offshore pumps to work like mining drills, where they 'mine' from tiles just like resources. This would require tile prototypes to specify their mining result (different from minable) as array[ProductPrototype]. This would also mean that offshore pumps should support item outputs. In this case, I would recommend combining the mining drill and offshore pump prototypes and having them specify whether or not they would mine tiles or entities.