[META] Upgrade *.drupal.org before D7 EOL

It would be nice to upgrade drupal.org suite of websites before D7 goes end of life.

It would be awesome to upgrade d.o websites to D10 before Drupal 10 is released.

Dates:
Drupal core release schedule →
https://www.drupal.org/psa-2022-02-23 →
https://www.drupal.org/about/core/blog/drupal-10-in-august-2022 →

D7 EOL: November 1, 2023
D10 release: August 17, 2022

Issues:
drupal.org 🌱 [META] Upgrade drupal.org to Drupal 10 Active
🌱 [META] Upgrade api.drupal.org to Drupal 9 Fixed
localize.drupal.org #3195336: [META] Upgrade localize.drupal.org to Drupal 9 →

Other active websites with unknown (private?) source code:
jobs.drupal.org #3195499: [META] Upgrade jobs.drupal.org to Drupal 9 →
events.drupal.org (based on COD #2723429: Port "Conference Organizing Distribution" to Drupal 9 → )
security.drupal.org

Websites which should not be upgraded:
assoc.drupal.org (some pages still accessible; redirect everything to drupal.org/association)
groups.drupal.org (still on Drupal 6 #3048700: Discontinue groups.drupal.org → )

Other issues related to d.o upgrade plan:
#3195504: Separate projects.drupal.org at Drupal 9 upgrade →

Slack channel: #d10drupalorg