expanding config/ adding test validation

[InoMurko]

This adds:

• vault write immutability-eth-plugin/config rpc_l1_url="$RPC_URL" chain_id="$CHAIN_ID" rpc_l2_url="$RPC_L2_URL" chain_l2_id="$CHAIN_ID_l2" the ability for the Vault to hold layer 2 information in configuration
• double checks all test outputs