Nargo Version Hash

[TomAFrench]

As a Noir consumer/developer
I would like to be able to track tools version (Nargo in this case) to git commit hash
so that I can easily identify changes through git history

Acceptance

1. nargo --help|version prints commit hash of git commit which was used to build this binary
2. .github/workflow of build-nargo is adjusted so that git commit hash is imprinted into binary