The BlockMap tests got much faster, so there's no need to hide them
behind a flag.
(cherry picked from commit 1e2496af552891e3b43c5703bda8dc4129bbcc5d)
* Remove LocatedBlock overhead in LBL map
* Add new space-efficient block map, with thourough testing
* Drop ordering property, add full insertion test
* Add licenses
* Fix mocked platform conflicts
* Disable full block map testing for faster builds
* Re-implement BlockMap with fastutil maps
* Re-write chunk batching to be memory efficient
* Make MultiStageReorder use BlockMap
* Increase LBL load factor, fix long-pack limit detection
* Fix infinite loop in chunk batching
* Save memory in history by cleaning up MSR
* Re-implement LocatedBlockList in BlockMap
* Fix data race with BlockType lazy fields
* Make IDs ALWAYS present, only runtime-consistent. Use for memory efficiency in BlockMap
* Remap inner structure of BlockMap for smaller maps
* Remove containedBlocks fields, not very efficient
* Fix minor de-optimizing bug in stage reorder
* Make long packed y signed
* Add extended Y limit configuration option
* Add licenses
* Store 3 ints for unoptimized BV list
* Add final to BitMath
* Correct int-cast for long-packing
