Fix run time errors with python3.12 and pyside6 (#13337)

* Change pyopen=open expression to from builtins import open as pyopen

---------

Co-authored-by: Adrián Insaurralde Avalos <36372335+adrianinsaval@users.noreply.github.com>

src/Mod/CAM/Path/Post/scripts/linuxcnc_post.py

@@ -29,6 +29,7 @@ import datetime
 import shlex
 import Path.Post.Utils as PostUtils
 import PathScripts.PathUtils as PathUtils
+from builtins import open as pyopen
 
 TOOLTIP = """
 This is a postprocessor file for the Path workbench. It is used to
@@ -128,9 +129,7 @@ POST_OPERATION = """"""
 # Tool Change commands will be inserted before a tool change
 TOOL_CHANGE = """"""
 
-# to distinguish python built-in open function from the one declared below
-if open.__module__ in ["__builtin__", "io"]:
-    pythonopen = open
+
 
 
 def processArguments(argstring):
@@ -290,7 +289,7 @@ def export(objectslist, filename, argstring):
     print("done postprocessing.")
 
     if not filename == "-":
-        gfile = pythonopen(filename, "w")
+        gfile = pyopen(filename, "w")
         gfile.write(final)
         gfile.close()