Verification builds: 1.18.2 via store

Summary: Inconsistencies in image formats for vanilla RP assets have crept in with newer item textures (Diamond armour and Netherite armour) with the image format now a mix of "Indexed Color (8 Colors)" and "RGB Color".

Impact: Working with RP assets is complicated by inconsistencies in asset formats.

Repro Steps:

1. Download Vanilla_Resource_Pack_1.18.1
2. Extract it
3. Observe the different file formats of textures\items\diamond_boots.png and textures\items\gold_boots.png

Observed Results:

textures\items\diamond_boots.png is image type "Indexed Color (8 Colors)" and textures\items\gold_boots.png is "RGB Color".

Armor items are affected, as well as netherite scrap, and diamond/netherite armor model UVs.

Expected Results:

Consistent file/colour formats for similar assets.

Screenshots/Videos attached: Comparison of image metadata between gold boots and diamond boots

Regression Builds: 1.17 also has this issue

Notes: None at this time.