Many Mob Models are broken

Build: 418100

Summary:
witches, guardians, elder guardians, villagers, horses and possibly more models are broken

Impact:
They look silly.

Repro Steps:
1./summon witch or /summon elder_guardian or /summon guardian
2.Look at them

Observed Results: They look dumb
Expected Results: They should look like their normal selves

Screenshots/Videos attached: yes