Parity: Piglins and Piglin Brutes don't drop their armor/weapon while zombified

Update: This also covers piglin brutes, they don't drop their axes while zombified!

Piglins don't their armor/crossbow while being converted into zombified piglins. This is fixed in the Java 1.16 snapshot.

Steps to Reproduce:
1. Spawn a piglin with a crossbow/armor.
2. Wait until it converts.

Expected Results:
Piglins drop their crossbow/armor after being zombified.

Observed Results:
They don't drop their crossbow/armor.