piglins spawnable in walls

Put the summary of the bug you're having here

What I expected to happen was...:
the piglin should be pushed out of the wall

What actually happened was...:
the piglin was stuck in the wall

Steps to Reproduce:
1. grab a piglin spawnegg
2. go to a wall block ( only tested with blackstone wall, but makes sense that it works with others too)
3. click on the block under the wall with right click to spawn the piglin

4. wonder why the piglin is stuck in the wall

I know it is not a very important bug, but it is good to know.