Accessibility: Blocks of gold and diamond use the same base texture, potentially posing problems for some colorblind players

Relates to MC-216203 and reported for the same reasoning.

While not nearly as severe due to these two being the only affected blocks, they pose problematic for the while rare still existent achromatopsia, where they are almost indistinguishable. They should be given different patterns (like in the early Texture Update resource packs) to prevent this.

The colorblind simulated images were generated by the Coblis online filter: https://www.color-blindness.com/coblis-color-blindness-simulator/