Release 2023.10

This is a re-release of 2023.9 with the correct version number.

This release has a variety of smaller fixes and cleanups, plus one new opt-in new feature to ensure the SELinux labels for /usr/etc are the same as /etc, which is important for enabling "transient etc" with ostree.

• compose: Two minor cleanups by @cgwalters in #4629
• ci: Bump hardcoded Ignition version by @cgwalters in #4639
• deny: Add ring by @cgwalters in #4630
• packaging/rpm-ostree: update python3 macros and builddep by @jmarrero in #4641
• docs/handbook: Add more details about inactive overrides by @jlebon in #4642
• Bump to ostree-ext 0.12.3 by @cgwalters in #4665
• Hard require ostree 2023.7 by @cgwalters in #4672
• Ensure rofiles-fuse gets SIGTERM if we exit by @cgwalters in #4660
• ci/upgrade: disable zincati.service in config.bu by @HuijingHei in #4671
• build(deps): bump tracing from 0.1.37 to 0.1.40 by @dependabot in #4669
• treefile: Add option to label /usr/etc as /etc by @cgwalters in #4640
• libpriv/rpm-util: Query package repo checksum under lock by @jlebon in #4673

Full Changelog: v2023.8...v2023.9