add ethbridge proxy admin addresses to networks config

[DZGoldman]

No description provided.

[TucksonDev]

A couple of things:

• If we change the interface, we need to add the proxyAdmin to the defaultLocalL2Network object in network.ts (I don't know what's the address though, or how to get it!).
• We also need to return the address of the proxyAdmin when generating the local network, in scripts/testSetup.ts, in the getCustomNetworks() function. We might obtain it from the docker exec nitro_sequencer_1 cat /config/deployment.json command that is run when trying to get the local config.
• Can you run the linter to add those missing commas and remove the warnings?