Fix T84684: Undo operators not working

Mistake in 2771dfd563. The commit left the new editors operator registration
in `ed_util_ops.c`, but removed the function call to it.
In other words, the ED-utils operators were not registered.

source/blender/editors/space_api/spacetypes.c

@@ -65,6 +65,7 @@
 #include "ED_space_api.h"
 #include "ED_transform.h"
 #include "ED_userpref.h"
+#include "ED_util.h"
 #include "ED_uvedit.h"
 
 #include "io_ops.h"
@@ -124,6 +125,7 @@ void ED_spacetypes_init(void)
   ED_operatortypes_render();
   ED_operatortypes_mask();
   ED_operatortypes_io();
+  ED_operatortypes_edutils();
 
   ED_operatortypes_view2d();
   ED_operatortypes_ui();