[3.11] Add note to `sys.orig_argv` clarifying the difference from `sys.argv` (GH-114630) (#114822)

Add note to `sys.orig_argv` clarifying the difference from `sys.argv` (GH-114630)
(cherry picked from commit 1836f674c0d86ec3375189a550c8f4a52ff89ae8)

Co-authored-by: Bradley Reynolds <bradley.reynolds@darbia.dev>
Co-authored-by: Ned Batchelder <ned@nedbatchelder.com>