bpo-43659: Fix test_curses on AIX (GH-25074)

curses.update_lines_cols() is only defined when the curses library
provides either resizeterm() or resize_term() functions which are optional
and are not provided on AIX.

Lib/test/test_curses.py

@@ -1174,6 +1174,7 @@ class TestCurses(unittest.TestCase):
 
 class MiscTests(unittest.TestCase):
 
+    @requires_curses_func('update_lines_cols')
     def test_update_lines_cols(self):
         curses.update_lines_cols()
         lines, cols = curses.LINES, curses.COLS