Iron Golems should attack drowned and jump under water.

I personally think that it would be very helpful if the iron golems we spawn were able to attack drowned, when in water, I think they should be able to move around, and it would be cool if they would jump at the drowned since the drowned would usually be higher than the golem. Currently the iron golems don't even move under water, and there isn't an efficient way to get them out of the water, so if they're in the water they should at least prove themselves useful against the insane rates of drowned that spawn.