I do not know if this is a bug or not or an intended game patch, however, for some reason, villagers are not affected by name tagged zombies in the new release. it still frightens the villagers but it does not allow it to spawn iron golems, unlike regular zombies does.
MC-157214
Villagers, and named Zombie
Resolved
Cannot Reproduce
0
I can confirm that names zombie does scare villagers and causes them to spawn golems. I have a farm using precisely this mechanic and it works exactly as expected. Version 1.14.4 java vanilla server.