gh-118761: Redudce the import time of ``optparse`` (#128899)

The same change was made, and for the same reason, by ``argparse`` back in
2017. The ``textwrap`` module is only used when printing help text, so most
invocations will never need it imported.

Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>