drm/xe: Mark GGTT work queue with WQ_MEM_RECLAIM

GGTT work queue is used to free memory thus we should allow this work
queue to run during reclaim. Mark with GGTT work queue with
WQ_MEM_RECLAIM appropriately.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Reviewed-by: Badal Nilawar <badal.nilawar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241021175705.1584521-3-matthew.brost@intel.com