Merging the prerelease branch. (#34775)

* Add changelogs

* Changelog edits.

* Amend readme.txt

* Updated package versions for automattic/jetpack

* Updated package versions for automattic/jetpack-mu-wpcom-plugin

* My Jetpack: Improve product cache handling on Jetpack AI (#34428)

* Only shows the price when the price information is available

* Support cache busting from the get_product method

* Renew product cache if tiers are enabled but there is no tier info on the cache

* Add changelog file

* Check for wp_error on feature data to handle Jetpack not being connected

* Release my-jetpack

* Update my-jetpack dependency

* Update changelog and readme.txt for Jetpack 12.9

* Carousel: fix unresponsive navigation (#34678)

* Changelog adn readme for 12.9.1

* Bump version numbers to 12.9.1

* Fix token subscription service name (#34723)

* Rename Token_Subscript_Service to Abstract_Token_Subscription_Service

* changelog

* Allow old class just in case

* `use` classes at the top to shorten up the class check.

* Release Videopress 0.21.3.1

---------

Co-authored-by: Kuba Birecki <kuba.birecki@crystalplanet.io>
Co-authored-by: Luiz Kowalski <lhkowalski@gmail.com>
Co-authored-by: sdixon194 <steve.dixon@automattic.com>
Co-authored-by: Kev <kevin.zoschke@automattic.com>
Co-authored-by: Christopher Smith <8002138+chrisfromthelc@users.noreply.github.com>

Committed via a GitHub action: https://github.com/Automattic/jetpack/actions/runs/7322883643