Static methods of eo-interface are generated in c# interface-concrete. there are
4 methods
efl_access_object_access_root_get, efl_access_object_event_emit,
efl_access_object_event_handler_add, efl_access_object_event_handler_del
If a class that inherits that interface, static method can't be called via
classname.
This commit changes eolian_mono by removing those static members from the C#
interface-concretes. If a generated class implements the interface, the static
member is generated as static member of the class directly.
Depends on D9800