Still in 19w14a
https://www.youtube.com/watch?v=i_oB1TOKPmE Here is a quick video I recorded showing the arrow of luck trade exists in 19w13b (demonstrated with commands). Set up a repeating command block with the command /summon minecraft:villager ~ ~ ~ {NoAI:1,VillagerData:{level:5,profession:"minecraft:fletcher"}}, which will spawn fletchers with just their last set of trades. The trade is quite rare, but eventually you can get it as shown, proving that luck is available in survival (unless the command summons villagers with wrong trades for some reason).
I believe this is unintentional, since MC-147041 involves getting "uncraftable tipped arrows", which are a different item from arrows of luck, and are obtained in different ways (uncraftable arrows from villager gifts, luck arrows from trading). Maybe being able to trade for arrows of luck is a bug itself though.
I'd like to point out that when I tried the bug myself, it looks like it consumes cookies but when you update the item in your inventory it corrects itself. Also the cookie death message was changed in this snapshot but you can no longer see it. I'd consider this bug a bug.
Still in 19w14b