asahi: Streamline modifier selection

asahi: Streamline modifier selection

We can only use linear for 2D images, not even 2D arrays. Even for 2D
images, we only want to use linear if:

* We are required to use linear due to window system requirements.
* The texture is streaming.

Otherwise, we want to use tiled textures. (Or better, compressed, but we
don't support that yet.)

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14903>