Ugly texture bleeding is visible in melon and pumpkin stems

Relates to MC-303669 and MC-304323.

According to the resolution of MC-96463, Mojang intentionally changed the melon and pumpkin stem models so that they would appear perfectly mirror-symmetric when viewed from certain angles, in deliberate contrast to all other cross-shaped plants in the game.

To reproduce:

• plant melon or pumpkin seeds

• bone meal until fully grown

• inspect the intersection point closely

Expected results: where there is mirror symmetry, the colour should be continuous from left to right.

Actual results: there is a vertical thin line of a different colour right in the corner of the two planes.

How to fix: remove the forced antialiasing applied to blocks placed in the world. Or at least, provide an option to turn it off.