feat: make model listing more generic (#5022)

* feat: make model listing more generic

* feat(playgrround): Make input optional for models query

* cleanup

* fix

* fix more

* Update src/phoenix/server/api/queries.py

Co-authored-by: Xander Song <axiomofjoy@gmail.com>

* remove azure

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Co-authored-by: Tony Powell <apowell@arize.com>
Co-authored-by: Xander Song <axiomofjoy@gmail.com>