Remove Custom Array-like Class Configuration

[lessthanjacob]

Changelog

• Removes custom array-like configuration in favor of depending on an interface (Enumerable in this case). Hash is an exception here due to existing implementation details.

Discussion

This was previously discussed as an option, but was decided against due to potentially be too open.

Checklist:

• [X ] I have updated the necessary documentation
• [X ] I have signed off all my commits as required by DCO
• My build is green

[jhollinger]

I like the direction here. But I do think that these kinds of heuristics will always fail someone. So IMHO the important thing is to allow the user to recover from that. What if render called out to render_one or render_all? Then if render gets it wrong for <insert obscure collection object>, the user could call render_one or render_all directly. We'd also need a
"hint option" for associations...

FWIW, render_one/render_all may not be the most descriptive names. render_object and render_collection? Or just options passed to render, maybe.

[lessthanjacob]

Will revisit at a later time.