The warden's right and left ribcages cannot be independently retextured

The right and left ribcages of the warden cannot be retextured seperately from one-another, meaning both will always look the same. This is not resource pack friendly.

Steps to Reproduce:

1. Use the resource pack provided here:
   

1. Spawn a warden

Observed Behavior:

The texture of both ribcages are changed using the resource pack.

Expected Result:

Only one ribcage would be changed, as that's all the player intended to alter. The current behavior is not resource pack friendly to creators, and additionally, all other elements of the warden which have a left and right side can be independently retextured.

Screenshots/Videos: