Initial Bug Scrub for 6.5.1

There is no specific target date for WordPress 6.5.1 yet. However, we can start ensuring that all the correct bugs are targeted for it and that work progresses towards fixing them.

To assist with preparation for 6.5.1, an initial scrub will be held at Thursday, April 4, 2024 at 18:00 UTC in the #core slack channel.

Thanks to @desrosj and @hellofromtonya for pre-publication review.

#6-5, #6-5-x, #bug-scrub