* limit incremental step size of stages 5 and 6
* remove limit, make incremental
* remove_load_start_key_from_etl
* switch to "struct of arrays" from "array of structs"
* switch to "struct of arrays" from "array of structs"
Co-authored-by: Alexey Akhunov <akhounov@gmail.com>
```
go run ./cmd/integration reset --chaindata=...
go run ./cmd/integration state_stages -h
go run ./cmd/integration state_stages --chaindata=... --verbosity=3 --block=2_000_000 --unwind=10 --unwind_every=1_000
```
Also, it inherits flags from geth:
```
--pprof.cpuprofile=./cpu.out // to file
--pprof --pprof.port=6060 // launch pprof server
--metrics // sends to prometheus
```
* save state
* txlookup full results
* save state
* save state
* remove experiments
* some fix&lint
* add end key to txLookup and index generation
* change log message
* change log
* fix lint
* lint
* fix test