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: 27e7e7cc87/medalla/bootnodes.txt

## Additional Info

NA

common/eth2_config/src/lib.rs

@@ -118,9 +118,9 @@ define_net!(
     medalla,
     include_medalla_file,
     "medalla",
-    "b21fef76ddf472c6cea62d5c98b678033a9b195a",
+    "09bbf2c9d108944ac934f94ec6a1d0684ca062a5",
     "https://raw.githubusercontent.com/sigp/witti/{{ commit }}/medalla/{{ file }}",
-    false
+    true
 );
 
 #[cfg(test)]