Hoglins/Zoglins don't have knockback resistance

When attacking a hoglin/zoglin, they don't seem to have any knockback resistance at all.

Steps to Reproduce:

1. Spawn a hoglin/zoglin
2. Punch it

Observed Results:
The hoglin/zoglin takes full knockback like a normal mob (e.g., zombie).

Expected Results:
The hoglin/zoglin should take half the knockback of a normal mob.