godsflaw-20220527: add WSTETH-B and update ETH->DAI routes

[godsflaw]

this change:

• adds WSTETH-B to the keeper
• updates the routes from ETH->DAI to go through USDC (less gas efficient, but less slippage)
• updates the minimum gas by +4 million as anything less got out-of-gas errors for this circuit.

[godsflaw]

Still testing if this path works. The more advanced path did not work for WSTETH, so it may not work here. Not sure why yet.

[godsflaw]

Nope, the more advanced routing doesn't work.

[talbaneth]

Change looks good:

• Verified chosen pools volumes are highest in https://info.uniswap.org/#/pools
• Verified mainnet.json changed ilks are what we expect (all but ilks using univ2, WSTETH-A and WSTETH-B which are not supported in callee level and CRVV1ETHSTETH-A which was lacking support in auction-demo-keeper logic).
• Verified succesfull liquidations for ETH-A, ETH-B, RENBTC-A.

I opened a PR to support also CRVV1ETHSTETH-A - #64.
Would be nice to merge it to this branch.

I'll also create 2 new tasks:

1. Supporting kicking curve lp (and charter later) auctions more easily with kick_auctions.sh script (or a similar one if we can't integrate it nicely there). The reason for it not to be currently supported seamlessly is that cropper and charter use the cdp registry (and not the the cdp manager).

2. Changing the WSTETH callee contract to support a complex path. This includes support in auction demo keeper when the new callee is deployed.

[talbaneth]

Opened:
makerdao/dss-simulation-scripts#7
makerdao/exchange-callees#29