refactor: ListModels Filtering Upgrade

[dave-gray101]

Description

This PR introduces just the ListModels and config package changes from my earlier middleware PR. In order to manage size and conflicts, this PR does not use Usecase-based filtering yet - simply migrates existing name based filtering to the new style and sets up the initial test to prove usecases are working.

In the upcoming [new] middleware PR, default models will take this into account and we can drive better dropdowns on the UI as well.