Enable release mode on dune by default

Context

This is a performance improvement for the Michelson interpreter and typechecker, by default dune runs in development mode, which includes things like -opaque disabling any implementation based optimization.

To disable this during development make DUNE_PROFILE=dev can be used

Benchmarks

I made some benchmarks using tezos-snoop and fact, just by enabling profile=release overall the results are ~35% improvement on mean time. On the full pipeline the results are not that impressive with this alone, but when combined with flambda, we can get boosts of up to ~20%.

https://gist.github.com/EduardoRFS/64731f087dd12399ec9b0925617d3b97

Checklist

• Document the interface of any function added or modified (see the coding guidelines)
• Provide automatic testing (see the testing guide).
• Add item in the Development Version section of CHANGES.md (only for new features and bug fixes).

Reviewers

@yrg