Rename _PyObject_FastCall() to _PyObject_FastCallDict()

Issue #27809:

* Rename _PyObject_FastCall() function to _PyObject_FastCallDict()
* Add _PyObject_FastCall(), _PyObject_CallNoArg() and _PyObject_CallArg1()
  macros calling _PyObject_FastCallDict()
diff --git a/Python/ceval.c b/Python/ceval.c
index bd0cbe7..96380bc 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -4593,7 +4593,7 @@
 
     if (args == NULL) {
         if (kwargs == NULL) {
-            return _PyObject_FastCall(func, NULL, 0, 0);
+            return _PyObject_CallNoArg(func);
         }
 
         args = PyTuple_New(0);
@@ -5298,7 +5298,7 @@
     stack[2] = f->f_locals == NULL ? Py_None : f->f_locals;
     stack[3] = fromlist;
     stack[4] = level;
-    res = _PyObject_FastCall(import_func, stack, 5, NULL);
+    res = _PyObject_FastCall(import_func, stack, 5);
     Py_DECREF(import_func);
     return res;
 }
diff --git a/Python/pythonrun.c b/Python/pythonrun.c
index 2968b34..3fb6f15 100644
--- a/Python/pythonrun.c
+++ b/Python/pythonrun.c
@@ -636,7 +636,7 @@
         stack[0] = exception;
         stack[1] = v;
         stack[2] = tb;
-        result = _PyObject_FastCall(hook, stack, 3, NULL);
+        result = _PyObject_FastCall(hook, stack, 3);
         if (result == NULL) {
             PyObject *exception2, *v2, *tb2;
             if (PyErr_ExceptionMatches(PyExc_SystemExit)) {
diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index be8e164..c170bd5 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -380,7 +380,7 @@
     stack[2] = (arg != NULL) ? arg : Py_None;
 
     /* call the Python-level function */
-    result = _PyObject_FastCall(callback, stack, 3, NULL);
+    result = _PyObject_FastCall(callback, stack, 3);
 
     PyFrame_LocalsToFast(frame, 1);
     if (result == NULL) {
@@ -2122,7 +2122,7 @@
     if (writer == NULL)
         goto error;
 
-    result = _PyObject_FastCall(writer, &unicode, 1, NULL);
+    result = _PyObject_CallArg1(writer, unicode);
     if (result == NULL) {
         goto error;
     } else {