Update dev guide to make use of containers the default

[pdurbin]

In a monthly meeting today we talked about how as part of our architecture and containerization strategy, we'd like to encourage developers to use the containers.

Concretely, we'd like to update the dev guide to no longer encourage developers to install Payara, PostgreSQL, and Solr directly on their laptops. Instead, we'd like to encourage the use of containers.

We'd like to keep the old content around as a fallback. I mentioned that I only got S3 working in containers this week. There may be parts of the code that are difficult to work on in containers.

[pdurbin]

I'm planning on moving the current dev env page to be called legacy or classic or something. Here are all the places that reference it:

[bencomp]

Ah, this explains why #9068 had merge conflicts 😞