gh-152325: Gate curses.has_mouse() on the ncurses patch level (GH-152652)

has_mouse() was added to ncurses after the 5.7 release, but the binding
guarded it only with NCURSES_MOUSE_VERSION, which 5.7 already defines, so
the module failed to compile against ncurses 5.7 (such as the system
curses on macOS).  Gate it additionally on NCURSES_EXT_FUNCS, which holds
the library's patch date.

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: serhiy-storchaka

Doc/library/curses.rst

@@ -465,6 +465,8 @@ Mouse
 
    Return ``True`` if the mouse driver has been successfully initialized.
 
+   Availability: ncurses 5.8 or later.
+
    .. versionadded:: next
 
 

Modules/_cursesmodule.c

@@ -7041,6 +7041,8 @@ _curses_meta_impl(PyObject *module, int yes)
 }
 
 #ifdef NCURSES_MOUSE_VERSION
+/* has_mouse() was added to ncurses after the 5.7 release. */
+#if defined(NCURSES_EXT_FUNCS) && NCURSES_EXT_FUNCS >= 20081122
 /*[clinic input]
 _curses.has_mouse
 
@@ -7055,6 +7057,7 @@ _curses_has_mouse_impl(PyObject *module)
 
     return PyBool_FromLong(has_mouse());
 }
+#endif /* NCURSES_EXT_FUNCS >= 20081122 */
 
 /*[clinic input]
 _curses.mouseinterval