BC250 is known to have non-functional compute queue. Thousands for Vulkan CTS tests fail, and many games are known to have visual glitches. RADV_DEBUG=nocompute is the known workaround for all these issues. Disable compute queue for this chip in both radv and radeonsi. Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33116>