Support BaseGoerli

[mikeki]

No description provided.

[jsy1218]

It felt like when we were rushing to support BASE, couple places were only coded to support BASE, but not BASE_GOERLI, including this repo and in smart-order-router.

I wonder if we first add BASE_GOERLI into SUPPORTED_CHAINS, and see if it can pass the smart-order-router github actions integration tests? (integration tests should automatically add the BASE_GOERLI into the test case, although we might need to add JSON URL into the repo secret)

[jsy1218]

I tried a bit from https://github.com/Uniswap/smart-order-router side. It appears BASE_GOERLI doesn't have the liquidity for the WETH/USDbC pools yet, so router side cannot be supported yet. Since it's testnet, we might be able to provide liquidities ourselves.