More compact representation of huffman trees in the seg files (#3875)

* More compact representation of huffman trees in the seg files

* Update to latest erigon-lib

* recompress

* recompress

* recompress

* uncompress: buf fix

* Update to latest erigon-lib

* Revert default sync mode

Co-authored-by: Alexey Sharp <alexeysharp@Alexeys-iMac.local>
Co-authored-by: Alex Sharp <alexsharp@Alexs-MacBook-Pro.local>
Co-authored-by: alex.sharov <AskAlexSharov@gmail.com>