Initial update to 1.21.3.
Compiles, launches, nothing tested yet.
Boat tag includes chest boat tag.
Avoid Material.values call.
Split ride checks to separate event handler.
Bypass the interact entirely and let EntityMount handle it, since we can't discriminate usage in interact.
Use more snapshot-less holders on Paper.
This is already past the debounce so in theory it's not getting hit *often*, but I guess if it's really slow it'll still show up. (a0e397e5 by wizjany)
