Minecraft generates mipmapped textures for decorated pots, but does not use them

Relates to: MC-276568 MC-277447 MC-277450 MC-277470 MC-277471

The bug

When loading the game's resources, Minecraft generates mipmapped textures for all decorated pot-related textures. However, it does not use them at all, wasting game resources.

How to reproduce

A resource pack is attached to this ticket.

1. Download and apply the attached resource pack

2. /fill ~ ~ ~ ~60 ~ ~60 minecraft:decorated_pot

3. /fill ~ ~ ~ ~60 ~ ~60 minecraft:terracotta

4. Compare

Expected results

The pots would fade into a smooth gray in the distance, much like the terracotta.

Actual results

No such thing happens and we get incredibly grainy Moire patterns.

How to fix

Either make decorated pots use mipmapping like other blocks (easily doable if they get converted over to use proper block models), or don't generate these mipmapped textures for pots at all. Several other atlases (gui, map decorations, mob effects, paintings, particles) don't generate mipmapped versions of themselves, so why should pots if they're not going to be used?