Model parts overlap in the guardian (guardian.png & guardian_elder.png) UV maps

Inside the UV texture map for the normal guardian and elder guardian, there are model parts which overlap. Meaning if one part is modified, other sections will be too.

Steps to Reproduce:

1. Apply the resource pack:
   

1. Summon a guardian type mob
   

   [media]

Overlap:

Total texture spaces of the different model parts:

1. Fin is red

2. Body is blue

3. Overlap is purple

Guardian:

Elder Guardian:

Notes:

1. This issue blocks: MC-271510

2. Related to: MC-271371 MC-225367