efl ui text - fix resource leak of strbuf and pointless buffer code

efl ui text - fix resource leak of strbuf and pointless buffer code

edje_object_part_text_style_user_push() doesnt need you to
stringshare_add a string... some other code did it because it "gets"
the string from an obj that might free/delete the string on push etc.
or before so it keeps a copy but then it stringshare_del's it
anyway... the _textpath_ellipsis_set() code creates a trsbuf that
wasn't freed if enabled was false and it never stringshare_del'd the
string is stringshare_added... all of this was pointless code anyway.
you could just pass the constant string directly.

fixes CID 1380543