intel/isl: Allow creating non-Y-tiled ASTC surfaces

intel/isl: Allow creating non-Y-tiled ASTC surfaces

The sampler can only decode ASTC surfaces that are Y-tiled. ISL has
been asserting this restriction at surface creation time.

However, some drivers want to create a surface that is only used for
copying compressed data. And during the copy, the surface won't have a
compressed format.

To enable this behavior, we choose to move the tiling assertion to the
moment a surface state is created for the sampler.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13881>