Wardens won't pathfind through lava even though they're immune to it

Seems to just be an oversight, but when chasing a target and the path to it has lava in the way, Wardens will not pathfind through it to get to their target, despite now being immune to lava as of 22w12a

This is inconsistent with other mobs that are immune to lava, which will attempt to walk through it to get to the player if there is no other option. This may lead to more cheesable situations for the Warden in the Deep Dark.