This reverts commit 1d2b52732e.
I hadn't considered that the likes of plugins and hoppers need to be
able to interact with double chest inventories as well as players.
If we were to move this logic to the Block side, we'd have to expose
APIs on the Chest block to get the correct inventory lazily. I'm not
sure I want to commit to having getInventory() on the block right now,
as we can't guarantee it's available (see problems around Campfire
inventory on the block).
Short term, it'll probably be better to just expose the logic in
block\Chest for deciding which side the inventories should be on.
it already needs to locate the correct pair anyway to know the left/right for DoubleChestInventoryWindow, so we might as well use this logic for initializing the DoubleChestInventory itself too. The old logic in tile/Chest didn't work correctly.
