This PR adds the "FULU" beacon chain config entries for all networks and
fixes the select statements that choose the appropriate engine API call
versions (no new version there but the "default" was always the first
version; now it's the latest version so no need to change unless there
is actually a new version).
New beacon checkpoints are also added for mainnet, sepolia and hoodi
(not for holesky because it's not finalizing at the moment).
Note that though unrelated to fusaka, the log indexer checkpoints are
also updated for mainnet (not for the other testnets, mainly because I
only have mainnet synced here on my travel SSD; this should be fine
though because the index is also reverse generated for a year by default
so it does not really affect the indexing time)
Links for the new checkpoints:
https://beaconcha.in/slot/13108192https://light-sepolia.beaconcha.in/slot/9032384https://hoodi.beaconcha.in/slot/1825728
