redir_parsing: fix memory leak when parsing a redirection with an operator as specifier

if the specifier was not WORD_TOKEN, the operator was not being freed

test.sh

@@ -613,4 +613,13 @@ parsed command
              ╰─ redirections = (empty redir list)
 EOF
 
+when_run <<EOF "multiple >"
+> > > >
+echo \$?
+EOF
+expecting <<"EOF"
+minishell: syntax error near unexpected token `>'
+2
+EOF
+
 finalize