`integrity`: to run under 30min on snapshotter servers

[AskAlexSharov]

If need:

• increase servers size: more ram, more cpu, faster cores
• increase sampling
• speedup checkers (it's endless rabbit hole - plz don't fall there)
• don't fall too much into caching of .kv file integrity-checkers: because .kv files are endless-merged and it means that "usually everything will be fast" and "sometime slow" - and we will not understand reason (will not able to reproduce, etc...)

Now:

• gnosis: taking 7 hours to release

Fail rate:

• probability of get state files progress (3454296875) is ahead of blocks files progress (3453884467) is high on chain-tip. And it's not recoverable now. I need manually rm-state -latest only to perform release. To prevent it: Erigon must have logic: "block files to not start building files if corresponding state files are not exist yet".
• After fix above - ensure files-releases-fail-rate to be near-zero