Add FeeCurrencyDirectory to Anvil migrations

[arthurgousset]

Description

@pahor167 merged the Anvil integration and FeeCurrencyDirectory PRs:

• https://github.com/celo-org/celo-monorepo/pull/10875
• https://github.com/celo-org/celo-monorepo/pull/10979

As a follow-up task, it would be good to add the FeeCurrencyDirectory to our Anvil migrations.

Context

Slack thread

[arthurgousset]

Estimates:

• Days - best: 1
• Days - most likely: 3
• Days - worst: 4

Assumptions for my estimates:

• I'm working on this during the DevTooling offsite in Warsaw. I don't expect to have long, uninterrupted periods of focus time.
• Even though I was in the Anvil meeting with Pavel/Volpe, I don't (really) understand how the shell scripts (e.g. migrations_sol/create_and_migrate_anvil_devchain.sh) and "fake" solidity files (e.g. migrations_sol/Migration.s.sol) work together to instantiate an anvil fork with the Celo core contracts. I think a good first step is to better understand how these files work together to create a working devchain. I'll measure my progress by the ability to (generate) and run a devchain locally, without starting from the JSON dump. I can probably work most of this out by looking at Github workflow that orchestrates all this.

[arthurgousset]

Working on this branch:

• https://github.com/celo-org/celo-monorepo/pull/10992