drm/xe: Add vm to exec queues association

drm/xe: Add vm to exec queues association

Maintain a list of exec queues per vm which will be used by TLB
invalidation code to do context-ID based tlb invalidations.

v4:
 - More asserts (Stuart)
 - Per GT list (CI)
 - Skip adding / removal if context TLB invalidatiions not supported
   (Stuart)

Signed-off-by: Nirmoy Das <nirmoy.das@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Stuart Summers <stuart.summers@intel.com>
Tested-by: Stuart Summers <stuart.summers@intel.com>
Link: https://patch.msgid.link/20260116221731.868657-6-matthew.brost@intel.com