Fix #105968: Crash when delete linked object in scenes Outliner

Problem here is that when selecting/activating an object in a different
scene in the Outliner, the Outliner will automatically switch scenes via
`WM_window_set_active_scene` however the `view_layer` was untouched and
as a consequence `BKE_view_layer_synced_ensure` gets the right scene but
the "wrong" viewlayer [which makes it not do its thing properly]

To solve, now use the new active viewlayer after having switched scenes.

NOTE this also solves a couple of other asserts elsewhere (when not
deleting, just selecting/activating could assert on
`DEG_is_evaluated_object(ob)`)

Pull Request: https://projects.blender.org/blender/blender/pulls/118458

source/blender/editors/space_outliner/outliner_select.cc

@@ -324,6 +324,7 @@ static void tree_element_object_activate(bContext *C,
   sce = (Scene *)outliner_search_back(te, ID_SCE);
   if (sce && scene != sce) {
     WM_window_set_active_scene(CTX_data_main(C), C, CTX_wm_window(C), sce);
+    view_layer = WM_window_get_active_view_layer(CTX_wm_window(C));
     scene = sce;
   }