Add note to sys.orig_argv clarifying the difference from sys.argv (…

…python#114630)

Co-authored-by: Ned Batchelder <ned@nedbatchelder.com>

Doc/library/sys.rst

@@ -1293,7 +1293,10 @@ always available.
    The list of the original command line arguments passed to the Python
    executable.
 
-   See also :data:`sys.argv`.
+   The elements of :data:`sys.orig_argv` are the arguments to the Python interpreter,
+   while the elements of :data:`sys.argv` are the arguments to the user's program.
+   Arguments consumed by the interpreter itself will be present in :data:`sys.orig_argv`
+   and missing from :data:`sys.argv`.
 
    .. versionadded:: 3.10