Piglin Head blocks cannot be waterlogged

The Piglin Head block cannot be waterlogged in Java Edition. This is not the case in Bedrock Edition, and the Piglin Head was introduced after 1.15, making this a valid parity issue.

(It's worth noting that other head blocks have the same issue, but were introduced prior to 1.15 and are thus invalid...)

Steps to reproduce:

1. Place down a Piglin Head block in Java Edition
2. Attempt to waterlog it by placing a Water Bucket on it
3. Notice it does not get waterlogged in Java Edition
4. Repeat Steps 1-2 in Bedrock Edition
5. Notice it does get waterlogged in Bedrock Edition