ethereum: rm truffle

[evan-gray]

Description and context

The work to no longer rely on truffle for Tilt CI and deployments has been completed, but some tasks remain from the initial goal of #3395. Ideally, all remnants of truffle should be removed while maintaining the same test and tooling coverage.

Definition of done

• All truffle test coverage is ported to forge (see Deprecate truffle #3395 for "61-ish" forge tests that were intended accomplish this)
• All truffle tests are removed
• Truffle scripts / config / other remnants are removed - The ethereum CI tests still use truffle and some various remnants remain.
• Port 'generate-abi.sh' and 'generate-abi-celo.sh' to foundry tooling