Add Medalla genesis state, more boot enr (#1438)
Add Medalla genesis state, more boot enr (#1438)

## Issue Addressed

NA

## Proposed Changes

- Include the Medalla `genesis.ssz` file.
- Adds the boot nodes from here: https://github.com/goerli/medalla/blob/27e7e7cc878c5484867cbef78b7a83d74238aced/medalla/bootnodes.txt

## Additional Info

NA




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