intel/fs: Drop the fs_surface_builder

intel/fs: Drop the fs_surface_builder

All of the actual abstraction (except possibly setting size_written)
happens as part of the logical opcodes.  The only thing that the surface
builder is providing at this point is extra levels of functions to call
through.  I'm going to be adding bindless image support soon and all the
extra abstraction here is just getting in the way.

Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>