feat: run devnet with configurable environments

[merklefruit]

This PR tries to address a shortcoming: running the Bolt devnet with all of its components locally can be difficult as we don't have all the components in the same repository.

Right now we require building helix, mev-boost, and builder as external images, and we assume users trying to run the devnet are also doing that themselves.

This is not robust. A better solution is to add a parameter to the just up recipe, defaulting to "latest" meaning that the kurtosis devnet will try to use the latest released version of all images and components.

Then, we can set it to something like "local" (e.g. just up local) to specify that we want to use locally-built images tagged with :local instead of :latest.

The next step in terms of UX is to add a simple way to explain what images one needs to build each time, but this will be restricted to devs actively working on those components instead of anyone trying to just get up and running.