drm/xe: Add generic dependecy jobs / scheduler

drm/xe: Add generic dependecy jobs / scheduler

Add generic dependecy jobs / scheduler which serves as wrapper for DRM
scheduler. Useful when we want delay a generic operation until a
dma-fence signals.

Existing use cases could be destroying of resources based fences /
dma-resv, the preempt rebind worker, and pipelined GT TLB invalidations.

Written in such a way it could be moved to DRM subsystem if needed.

v3:
 - Remove unnecessary cast (Staurt)

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Stuart Summers <stuart.summers@intel.com>
Link: https://lore.kernel.org/r/20250724191216.4076566-3-matthew.brost@intel.com