Enable efficient indexing of historical chain data

[fridrik01]

See https://github.com/filecoin-project/fvm-pm/issues/299

Lotus currently uses the following sqlite databases:

• sqlite/events.db: Stores events sent by actors in the FVM
• sqlite/txhash.db: Stores mappings of Eth tx hash to Filecoin message cid
• sqlite/msgindex.db: Stores block messages cid and their tipset cid for faster lookup

We should try to unify all the different databases into one which should make maintaining correctness and doing recovery/backfilling simpler.

Also, we make sure we handle the following:

• Make sure we handle all edge cases (forks, reverts, config changes that require pruning, etc)
• Allow enabling/disabling what to index
• ~~Be able to configure lookback so these indices don't grow endlessly~~ Not needed as the indexes are tiny compared to chain data (less than 0.25%)
• #11007