iris: disable gpu hang recovery for now
There's a bug somewhere, which completely messes up the X session (X flips between last 2 frames) if we attempt to recover the client (!) GL session and then try to swap buffers. Just give up for now and kill the offending application.
However, if client specified reset notification strategy to LOSE_CONTEXT_ON_RESET, then it's safe to continue because GL context will not be used anyway (all GL functions are NOPed by _mesa_set_context_lost_dispatch through batch->reset->reset).