Fix #117280: Cycles: Lights from instancer not working randomly

The issue was caused by light and shadow linking runtime data not
evaluated first time for lights linked to scene indirectly.

Simple solution is to hook up shading component to the instance
operation, so that visibility flag is properly propagated to the
shading component, and the light linking is evaluated.

Do it as non-flushing operation to prevent possible unwanted
re-evaluated of instancers.

Pull Request: https://projects.blender.org/blender/blender/pulls/117301

source/blender/depsgraph/intern/builder/deg_builder_relations.cc

@@ -1275,6 +1275,15 @@ void DepsgraphRelationBuilder::build_object_shading(Object *object)
 
   const OperationKey shading_key(&object->id, NodeType::SHADING, OperationCode::SHADING);
   add_relation(shading_key, shading_done_key, "Shading -> Done");
+
+  /* Hook up shading component to the instance, so that if the object is instanced by a visible
+   * object the shading component is ensured to be evaluated.
+   * Don't to flushing to avoid re-evaluation of geometry when the object is used as part of a
+   * collection used as a boolean modifier operand. */
+  add_relation(shading_done_key,
+               OperationKey(&object->id, NodeType::INSTANCING, OperationCode::INSTANCE),
+               "Light Linking -> Instance",
+               RELATION_FLAG_NO_FLUSH);
 }
 
 void DepsgraphRelationBuilder::build_object_light_linking(Object *emitter)