Sign block using correct chainId
Add IsPulseChain to config
Add support for pulsechain blocks and snapshots
Add support for chain config now located in erigon-lib
Fix decoding hex to int
Ensure pulsechain config
Add support for PulseChain snapshots
This branch implements support of btree indexes instead of .kvi files.
Kvi also created, but not used during search/lookup, only for size
comparation.
Btree allows to make seek calls, while recsplit indexes does not support
that query.
During initial tests, btree indexes are ~1-3% smaller than recsplit but
avg lookup time bigger up to 1.5us (which compensates with ability to
fetch next key).
BtAlloc
```
337000 searches, last took 5.417µs avg=4.385µs next_access_last[of 10000 keys] 105ns
338000 searches, last took 3.792µs avg=4.385µs next_access_last[of 10000 keys] 103ns
339000 searches, last took 5.125µs avg=4.386µs next_access_last[of 10000 keys] 103ns
340000 searches, last took 4.75µs avg=4.386µs next_access_last[of 10000 keys] 103ns
341000 searches, last took 3.875µs avg=4.386µs next_access_last[of 10000 keys] 104ns
342000 searches, last took 6.042µs avg=4.387µs next_access_last[of 10000 keys] 107ns
343000 searches, last took 3.209µs avg=4.388µs next_access_last[of 10000 keys] 108ns
344000 searches, last took 2.292µs avg=4.393µs next_access_last[of 10000 keys] 113ns
345000 searches, last took 2.417µs avg=4.394µs next_access_last[of 10000 keys] 106ns
346000 searches, last took 2.625µs avg=4.394µs next_access_last[of 10000 keys] 103ns
347000 searches, last took 4.417µs avg=4.397µs next_access_last[of 10000 keys] 104ns
348000 searches, last took 5.458µs avg=4.398µs next_access_last[of 10000 keys] 103ns
349000 searches, last took 4.875µs avg=4.4µs next_access_last[of 10000 keys] 102ns
350000 searches, last took 4.25µs avg=4.4µs next_access_last[of 10000 keys] 104ns
351000 searches, last took 6.25µs avg=4.403µs next_access_last[of 10000 keys] 106ns
352000 searches, last took 3.125µs avg=4.404µs next_access_last[of 10000 keys] 106ns
```
Recsplit
```
354000 searches, last took 1.209µs avg=3.081µs
355000 searches, last took 1.333µs avg=3.076µs
356000 searches, last took 1.541µs avg=3.071µs
357000 searches, last took 1.333µs avg=3.066µs
358000 searches, last took 1.333µs avg=3.062µs
359000 searches, last took 1.167µs avg=3.057µs
360000 searches, last took 1.791µs avg=3.052µs
361000 searches, last took 1.209µs avg=3.048µs
362000 searches, last took 1.375µs avg=3.043µs
363000 searches, last took 1.166µs avg=3.038µs
364000 searches, last took 1.625µs avg=3.033µs
365000 searches, last took 1.125µs avg=3.029µs
366000 searches, last took 1.208µs avg=3.024µs
367000 searches, last took 1.333µs avg=3.019µs
368000 searches, last took 1.791µs avg=3.015µs
369000 searches, last took 1.333µs avg=3.01µs
370000 searches, last took 1.166µs avg=3.006µs
371000 searches, last took 1.125µs avg=3.001µs
372000 searches, last took 1.333µs avg=2.997µs
```
https://github.com/ledgerwatch/erigon-lib/pull/891/files
