Add lava buckets to gifts from villagers (after defeating raid) [java]

This incredibly small change is often utilised already through data pack by many players. This is because in skyblock, single block or any other custom/sparsely generated world, lava is only renewable if you have some lava to begin with (via dripstone).

Lack of vanilla organic lava access is the only obstacle to being able to complete the game with essentially no original resources due to mob farms, wandering traders and a load of patience. It is still extremely difficult to play the game this way so would not affect game linearity too much - for the casual player, there are many easier ways to get a bucket of lava, including from a blacksmith house.