ethereum: rm truffle

[evan-gray]

This PR fixes #4069, removing the remaining CI dependencies on truffle and porting the remaining tests from jest to forge (borrowed from #3395).

This also offers some modest speed improvements such as faster npm ci and an ethereum-upgrade test runtime of 4m 22s instead of 7m 20s. 😀

Note: This change explicitly does not remove the remappings line for 'truffle/=node_modules/truffle/', as that, irritatingly, resulted in a hash change in the byte code. Actually had to add it back into the relayer one. Just like #4049, this can be verified by building locally (ensure you are on forge 0.2.0 (55bf415 2024-08-04T00:22:40.167411524Z)) or by exec'ing into eth-devnet-0:tests and diffing the following, where only test files should have changed:

cd ~/app/ethereum/build-forge
find . -type f -exec sha256sum {} \;
cd ~/app/relayer/ethereum/build-forge
find . -type f -exec sha256sum {} \;

[panoel]

I didn't look at the forge tests or scripts.

[gator-boi]

I reviewed the ethereum directory. The tests in this PR are meant to replicate the existing javascript tests. However, these tests need a lot of work and there should be a follow up PR that fixes these tests (and adds a more comprehensive test suite). Here is a short list of enhancements we could add to improve the test suite:

• Splitting out tests into positive and negative tests. Currently a lot of the revert statements are triggered in the same test that evaluate happy path logic.
• Changing the test names (and add a comment for each test describing what the test does). Some of the test names are insanely long and are difficult to read.
• Adding helper functions for payload generation. For example, the Bridge tests could use a method that generates a token transfer payload given some common inputs.
• Write helper functions to set up certain testing scenarios rather than calling other tests internally.
• Use the wormhole interfaces in the tests instead of duplicating events, and constants.
• Fuzz testing

[nonergodic]

I'm late to this, but given that truffle has been removed, could we now merge the relayer back into the Ethereum folder? (see original PR why it was moved out)