Incorrect shading of the Java block/item model elements

Bug description: the shading does not use cube rotation, so an element with a rotation of 0 and with a rotation of 45 degrees will have the same face shading.

Examples:

Resource Pack with two models is attached to the bug report.

• The first model rotates the elements closer to the sides (42.5 degrees).

• The second model rotates the elements closer to the upper face (42.5 degrees).

Expected behavior:

• Rotated elements have an average shade between the upper and side faces

Current behavior:

• Rotated elements have the same shade as a element without rotation.

Repetition steps:

1. Download and enable the attached Resource Pack;

2. Run the command to summon the item_display with the first model:
   /summon item_display ~ ~ ~ {item:{id:"stick",components:{"item_model":"test_model_shading:test1"}}};

3. Run the command to summon the item_display with the second model:
   /summon item_display ~ ~ ~ {item:{id:"stick",components:{"item_model":"test_model_shading:test2"}}};

4. Compare the shading of elements whose difference is 5 degrees.