move log to erigon repo

[AskAlexSharov]

We decided to abandon Apache re-licensing. Means next thing can be done related to logger.

• move github.com/ledgerwatch/log/v3 back to erigon's repo. see https://github.com/ethereum/go-ethereum/tree/master/log
• to port geth features of log package (usage of slog log: use native log/slog instead of golang/exp ethereum/go-ethereum#29302 , etc...). Maybe just switch to geth's logger as-is (maybe it's easy, i don't know).

[AskAlexSharov]

done