Revisit getopt and optparse soft deprecations #126225

Duplicate of #126180

(Based on @serhiy-storchaka's Discourse thread at https://discuss.python.org/t/getopt-and-optparse-vs-argparse/69618 ).

I'm going to draft a PR for this, and wanted an issue number for the NEWS entry.

The PR will be initially marked as DO-NOT-MERGE, as this feels like a change that needs an explicit +1 from the next SC (since we'd be reversing a deprecation that come from a previously approved PEP: https://peps.python.org/pep-0389/#deprecation-of-optparse)

Interestingly, the deprecation notice in getopt goes against the contents of PEP 389 ("The getopt module will not be deprecated. However, its documentation will be updated to point to argparse in a couple of places.")

Linked PRs

• gh-126180: Remove getopt and optparse deprecation notices #126227