[3.10] gh-92446: Improve argparse choices docs (GH-94627) (#100529)

Based on the definition of the collections.abc classes, it is more accurate to use "sequence" instead of "container" when describing argparse choices.

(cherry picked from commit ad3c99e521)

Co-authored-by: Guy Yagev <yourlefthandman8@gmail.com>
Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>