Depsgraph: Use HIGH priority for scheduled tasks

This kind of keeps threads "warmer" and should in theory give better
cache coherency bringing some %% of speedup. It was already tested
few months ago and it gave few % speedup in barber shop, but was
reverted due to some bone popping. The popping is now fixed so it
should be fine to use new scheduling policy.

source/blender/depsgraph/intern/eval/deg_eval.cc

@@ -304,7 +304,7 @@ static void schedule_node(TaskPool *pool, Depsgraph *graph, unsigned int layers,
 					                               deg_task_run_func,
 					                               node,
 					                               false,
-					                               TASK_PRIORITY_LOW,
+					                               TASK_PRIORITY_HIGH,
 					                               thread_id);
 				}
 			}