Repair alternate versions of dead slots (#9805)

Co-authored-by: Carl <carl@solana.com>

runtime/src/genesis_utils.rs

@@ -28,6 +28,14 @@ impl ValidatorVoteKeypairs {
             stake_keypair,
         }
     }
+
+    pub fn new_rand() -> Self {
+        Self {
+            node_keypair: Keypair::new(),
+            vote_keypair: Keypair::new(),
+            stake_keypair: Keypair::new(),
+        }
+    }
 }
 
 pub struct GenesisConfigInfo {