bpo-42161: Use _PyLong_GetZero() and _PyLong_GetOne() (GH-22995)

Use _PyLong_GetZero() and _PyLong_GetOne()
in Objects/ and Python/ directories.
diff --git a/Objects/clinic/floatobject.c.h b/Objects/clinic/floatobject.c.h
index b755483..5643f0e 100644
--- a/Objects/clinic/floatobject.c.h
+++ b/Objects/clinic/floatobject.c.h
@@ -206,7 +206,7 @@ static PyObject *
 float_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
 {
     PyObject *return_value = NULL;
-    PyObject *x = _PyLong_Zero;
+    PyObject *x = NULL;
 
     if ((type == &PyFloat_Type) &&
         !_PyArg_NoKeywords("float", kwargs)) {
@@ -387,4 +387,4 @@ float___format__(PyObject *self, PyObject *arg)
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=25fbbe253f44e2df input=a9049054013a1b77]*/
+/*[clinic end generated code: output=bb079c3e130e4ce6 input=a9049054013a1b77]*/