* op-batcher op-proposer op-service: Introduce op-service

op-service is a utilities library that automates much of the boilerplate setup we've been duplicating across different daemons. This PR adds the following to op-batcher:

- Common setup utilities for logging, metrics, pprof, and RPC.
- For each of the above functions, a set of CLI flags and configs that can be used to parse + validate CLI configuration for that module.
- A base RPC server that implementers can extend.
- HTTP metrics utilities.

* update dockerfiles

* code review updates

* op-service: temporary replace, until op-service go module is canonical and can be resolved
Co-authored-by: protolambda <proto@protolambda.com>