bpo-36935: Remove usage of the deprecated PyErr_SetFromWindowsErrWithUnicodeFilename() (GH-13355)

In e895de3, the
deprecated function PyErr_SetFromWindowsErrWithUnicodeFilename() was
added in two functions in Modules/_winapi.c. This function was
deprecated in 3.3.

Author: ZackerySpytz

Modules/_winapi.c

@@ -508,7 +508,9 @@ _winapi_CreateFileMapping_impl(PyObject *module, HANDLE file_handle,
     Py_END_ALLOW_THREADS
 
     if (handle == NULL) {
-        PyErr_SetFromWindowsErrWithUnicodeFilename(0, name);
+        PyObject *temp = PyUnicode_FromWideChar(name, -1);
+        PyErr_SetExcFromWindowsErrWithFilenameObject(PyExc_OSError, 0, temp);
+        Py_XDECREF(temp);
         handle = INVALID_HANDLE_VALUE;
     }
 
@@ -1405,7 +1407,9 @@ _winapi_OpenFileMapping_impl(PyObject *module, DWORD desired_access,
     Py_END_ALLOW_THREADS
 
     if (handle == NULL) {
-        PyErr_SetFromWindowsErrWithUnicodeFilename(0, name);
+        PyObject *temp = PyUnicode_FromWideChar(name, -1);
+        PyErr_SetExcFromWindowsErrWithFilenameObject(PyExc_OSError, 0, temp);
+        Py_XDECREF(temp);
         handle = INVALID_HANDLE_VALUE;
     }