bpo-45439: Move _PyObject_CallNoArgs() to pycore_call.h (GH-28895)

* Move _PyObject_CallNoArgs() to pycore_call.h (internal C API).
* _ssl, _sqlite and _testcapi extensions now call the public
  PyObject_CallNoArgs() function, rather than _PyObject_CallNoArgs().
* _lsprof extension is now built with Py_BUILD_CORE_MODULE macro
  defined to get access to internal _PyObject_CallNoArgs().

Objects/enumobject.c

@@ -1,6 +1,7 @@
 /* enumerate object */
 
 #include "Python.h"
+#include "pycore_call.h"          // _PyObject_CallNoArgs()
 #include "pycore_long.h"          // _PyLong_GetOne()
 #include "pycore_object.h"        // _PyObject_GC_TRACK()