virgl/vtest: deprecate protocol version 1

virgl/vtest: deprecate protocol version 1

This is a partial revert of 9d81cd ("virgl: Pass resource size and
transfer offsets").

The adjustments made in the client code means there's various
mismatches when transfering data.

Let's fallback to protocol version 0 and deprecate protocol
version 1.  We can still use the protocol version 1 slots for
a shared memory transfer mechanism later.

Fixes:
  dEQP-GLES31.functional.copy_image.mixed.viewclass_128_bits_mixed.*_renderbuffer

Reviewed-By: Gert Wollny <gert.wollny@collabora.com>