[3.13] gh-121151: argparse: Fix wrapping of long usage text of arguments inside a mutually exclusive groups (GH-121159) (#122777)

gh-121151: argparse: Fix wrapping of long usage text of arguments inside a mutually exclusive groups (GH-121159)
(cherry picked from commit 013a0929750ed2b46ae990b59d02e3db84337474)

Co-authored-by: Ali Hamdan <ali.hamdan.dev@gmail.com>