Mobs converting to other mobs desync rotation with client

When a villager is rotated (not a y rotation of 0), and gets cured, they don't appear to be facing the right direction.

Steps to reproduce:

1. summon zombie_villager ~ ~ ~ {NoAI:1b,Rotation:[90.0f,0.0f]}

2. data merge entity @e[type=zombie_villager,sort=nearest,limit=1] {ConversionTime:1}

3. Observe villager appearing to be rotated to y rotation 0.

4. data get entity @e[type=villager,sort=nearest,limit=1] Rotation

5. Observe it has the value [90.0f,0.0f]

6. Let a zombie zombify it again.

7. data get entity @e[type=zombie_villager,sort=nearest,limit=1] Rotation

8. Observe it has the value [90.0f,0.0f] but is still visually rotated to y rotation 0.

Affected conversions:

• villager -> zombie villager

• zombie villager -> villager

• husk -> zombie

• zombie -> drowned

• skeleton -> stray

• hoglin -> zoglin

• piglin -> zombified piglin

• piglin brute -> zombified piglin

• villager -> witch

• villager -> zombified piglin

• mooshroom -> cow

• tadpole -> frog

• slime -> smaller slime (random rotation, only can be observed via NoAI)

• magma cube-> smaller magma cube (random rotation, only can be observed via NoAI)