Unify deployment scripts

[e00E]

It's a shame that we blatantly copy this deploy script across repos but now even inside the same repo. I think there should be a way to share this logic in a function and just invoke it with the few arguments that are different. Maybe it could even be imported from a shared source across repos.

Originally posted by @fleupold in https://github.com/gnosis/dex-services/pull/1015/files