Sync packages for WP 6.9 RC 1.

Changes can be found at https://github.com/WordPress/gutenberg/commits/wp/6.9/.

Developed in #10495.
See https://make.wordpress.org/core/handbook/about/release-cycle/block-editor-release-process-for-major-releases/#package-updates-and-core-patches.

Fixes #64220.
Props priethor.

git-svn-id: https://develop.svn.wordpress.org/trunk@61211 602fd350-edb4-49c9-b593-d223f7449a82

Author: ellatrix