drm/xe: Create ordered workqueue for GT TLB invalidation jobs

No sense to schedule GT TLB invalidation jobs in parallel which target
the same GT given these all contend on the same lock, create ordered
workqueue for GT TLB invalidation jobs.

v3:
 - Fix type in commmit message (Stuart)

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Stuart Summers <stuart.summers@intel.com>
Link: https://lore.kernel.org/r/20250724191216.4076566-4-matthew.brost@intel.com