Pitcher Plant has unused bottom texture

Related to MC-261208
Breaking a farmland block with a Pitcher Plant on top and viewing the plant from underneath shows no texture for its bottom face.

There is a pitcher_crop_bottom.png file, but it is currently unused.

Steps to Reproduce

1. Place the pitcher crop with the commands.
   /setblock ~ ~ ~ pitcher_crop["growth":7]
2. Look at the bottom of the crop.

Expected Result
The pitcher crop should show the bottom texture

Observed Result
The pitcher crop doesn't show the bottom texture and the texture file remains unused.