drm/xe: Do not print timedout job message on killed exec queues

If a user ctrl-c an app while something is running on the GPU, jobs are
expected to timeout. Do not spam dmesg with timedout job messages in
this case.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://lore.kernel.org/r/20250428175505.935694-1-matthew.brost@intel.com