Issue #28858: Remove _PyObject_CallArg1() macro

Replace
   _PyObject_CallArg1(func, arg)
with
   PyObject_CallFunctionObjArgs(func, arg, NULL)

Using the _PyObject_CallArg1() macro increases the usage of the C stack, which
was unexpected and unwanted. PyObject_CallFunctionObjArgs() doesn't have this
issue.
diff --git a/Objects/abstract.c b/Objects/abstract.c
index beb12c9..a6a58db 100644
--- a/Objects/abstract.c
+++ b/Objects/abstract.c
@@ -2496,7 +2496,7 @@
     assert(args != NULL);
 
     if (!PyTuple_Check(args)) {
-        result = _PyObject_CallArg1(callable, args);
+        result = PyObject_CallFunctionObjArgs(callable, args, NULL);
     }
     else {
         result = PyObject_Call(callable, args, NULL);