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.

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[dave-gray101]

@mudler I just updated this for the new SoundGeneration endpoint. It's ready for review whenever you get a chance - should have no effects on current behavior, just sets groundwork and introduces a test for a heuristic Usecase function we can use to drive dropdowns and suggest better "defaults"

[dave-gray101]

force push seems to have fixed DCO - hopefully it doesn't snag again.

[dave-gray101]

@mudler mind reviewing this when you get a chance? It's been sitting a while, so I did just merge master to shake out the dust.

[mudler]

this coqui test started to be flaky lately, ugh

[dave-gray101]

this coqui test started to be flaky lately, ugh

I have been baby sitting that one for a few weeks now - it's unfortunately not related to PR content and is something we'll need to address separately.