Add all necessary contracts to the SystemConfig’s Addresses struct

[maurelian]

The OPCM uniquely identifies each OP Chain by its SystemConfig. For upgrades the OPCM will retrieve the Addresses struct from the SystemConfig to identify all contracts it needs to interact with during the upgrade process.

Currently that struct is lacking certain contracts which are required, including:

• AddressManager
• DelayedWeth(s)
  • although these might be best retrieved by querying: gameImpl(DisputeGameFactory.gameImpls(n)).weth()

A new getter should also be added to the SystemConfig to retrieve the full Addresses struct in a single call.