This updates the blsync base types for the Electra fork. I've been
testing, and it doesn't seem to make blsync fully work on Electra. But
I'd still like to get this in to make some progress.
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Co-authored-by: Zsolt Felfoldi <zsfelfoldi@gmail.com>
This PR moves chain config related code (config file processing, fork
logic, network defaults) from `beacon/types` and `beacon/blsync` into
`beacon/params` while the command line flag logic of the chain config is
moved into `cmd/utils`, thereby removing the cli dependencies from
package `beacon` and its sub-packages.
