integrate ethabi into parity repo

[guanqun]

Fixes #3380 's first task.

I decided to keep the commit history, so the that's why you see there are some previous commits from @debris

The interesting commits from my side are:

• update the depedencies' path 57b1124
• resolve the multiple workspace error b5b1814
• downgrade tiny-keccak to 1.0 and its changes ac261ce
• add ethabi-cli to parity 527ed6a
• update Cargo.lock file c61f926

I explicitly downgraded the tiny-keccak's version in ethabi. Because I tried to run cargo update, but it hangs...

I ran:

• cargo build and cargo test
• ./test.sh
  All seems fine.

[debris]

@gavofyork, I know that's a part of #3380, but given your yesterday's message about repo split is it still a thing we want to do?

[guanqun]

We're going to split the repo? Hmm, then it seems this is worthless... I should've asked you first.

Anyway I'll fix these issues in the next few days if we still want this.

[gavofyork]

carry on for now. the refactoring will be a much bigger job and it's not clear at this point where the repo splits are best made.

[debris]

This pr hasn't been updated for > 28 days and I'm closing it as a part of pull request cleanup. If it's still relevant, please rebase and reopen it.