build separate priceFeed coreEval for each target environment

[Chris-Hibbert]

What is the Problem Being Solved?

#10074 prepares a new coreEval for the priceFeed release, which will update priceFeeds, scaledPriceAuthorities, auctions and vaults. Since it has to know the Oracle addresses and currencies at build time, it needs to be run separately for each target environment. While the code bundles should be identical, the proposals will be different for each one.

Description of the Design

Our runBook describes process that presume we can re-use the build artifacts across environments. We should document different processes that support this variation.

Security Considerations

This is more about robustness than security.

Scaling Considerations

N/A

Test Plan

We can use our tests across different platforms to validate that we have a process that is adaptable. Running the coreEval in mainFork that we intend to use on mainNet will show that we have the currencies right, but we'll have to carefully verify the oracle addresses.

Upgrade Considerations

It's all about upgrade.