This adds the Gnosis and Chiado configs to the CL. I'm sure there's
other things missing too. Any pointers would be appreciated!
Currently stuck on:
```
INFO[02-06|14:00:01.421] [Checkpoint Sync] Requesting beacon state uri=https://checkpoint.gnosis.gateway.fm/eth/v2/debug/beacon/states/finalized
INFO[02-06|14:00:02.846] [Checkpoint Sync] Retrieving lightclient bootstrap from sentinel root=6cd2f0f4018d7ca17c9bfaf69f7eb46706b5a9b3356b9686aa71ae15a11c47e4
```
This PR Adds:
* Backfilling routine, downloads and write to db all historical blocks.
* Prototype of first attempt at Database schema for Historical blocks.
* Fixed minor bugs.
* Support for following forks: Phase0, Altair, Bellatrix.
Embedded CL is not supported for Gnosis Chain, so it makes sense to set
`externalcl` to true by default for it.
Also, this PR sets `terminalTotalDifficultyPassed` for Gnosis Chain &
Chiado (see https://docs.gnosischain.com/updates/20221210-merge).
