v2.34.0

1. Stage hash_state (hashing state keys) now utilises multiple CPU cores.
2. Upgraded to MDBX 0.12.3 (akula), improving performance of mass-deletes.
3. Reduced chunk size for torrents of block snapshots from 1Mb to 512Kb, to improve performance on some routers.
4. Reduced agressiveness of handing empty responses for BSC/Polygon. Now peers returning empty responses are only removed during intial sync.
5. Brought errors resulting in headers stage rejecting the headers to the logs, potentially improving the diagnostics of the “stuck sync” scenarios.
6. Made various small bugfixes.