[BLOCKING] Fishes all have UV bugs

> Summary:
All fish models (Cod, Salmon, Pufferfish and Tropical fishes) have wrongly mapped textures, wrong UV on several parts of the entity as described below (and reported on Java version).

> Impact:
It's nearly impossible to texture those entities with HD textures without very visible bugs on fins and spikes.

> Repro Steps:
Use PureBDcraft textures attached to see the errors in game. Errors are not visible with Vanilla textures because fins or spikes are 1px wide (and so the flip bugs are invisible)

> Observed results:
Many flip bugs on different entities parts or some textures are wrongly positionned, overlapping other parts.

> Expected results:
Fixed overlapping textures bugs + Fixed flipped faces

All fish models need to be tweaked so each entity part has right texture and right orientation.

> Related issues on Java:
https://bugs.mojang.com/browse/MC-130097

https://bugs.mojang.com/browse/MC-130026

 
> Screenshots/videos attached:
Yes