drm/xe/multi_queue: Add support for multi queue dynamic priority change

drm/xe/multi_queue: Add support for multi queue dynamic priority change

Support dynamic priority change for multi queue group queues via
exec queue set_property ioctl. Issue CGP_SYNC command to GuC through
the drm scheduler message interface for priority to take effect.

v2: Move is_multi_queue check to exec_queue layer and assert
    is_multi_queue being set in guc submission layer (Matt Brost)
v3: Assert CGP_SYNC message length is valid (Matt Brost)

Signed-off-by: Pallavi Mishra <pallavi.mishra@intel.com>
Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20251211010249.1647839-26-niranjana.vishwanathapura@intel.com