WooCommerce Stripe 8.9.0

* Tweak - Improve the display of the Stripe account ID in the settings page.
* Add - Enable custom styling of the Payment Elements for stores using the updated checkout experience.
* Fix - Alipay icon not being displayed on the Block checkout page.
* Fix - Ensure the hold stock setting does not cancel pending stripe orders that are still waiting for customer action (eg confirm 3DS or complete payment redirect).
* Fix - Prevent checkout errors when customers with one-word names process payment using Apple Pay or Google Pay.
* Tweak - Remove the functionality for saving the customized statement descriptors.
* Tweak - Remove unused WC_Stripe_Old_Settings_UPE_Toggle_Controller class and related scripts.
* Update - Save the Stripe default appearance settings in a transient instead of the browsers local storage.
* Tweak - Update Link by Stripe branding assets.

* Fix - Do not hide PRB on cart and product page when there are required custom checkout fields.
* Fix - Issue with subscription renewal when the `start_date` of the mandate is set in the past.

* Add - Implement deferred payment intents for the Payment Element (or UPE), used on the updated checkout experience.
* Add - Implement split Payment Elements (or split UPE), splitting the payment method types under the updated checkout experience into different gateways.
* Add - Update the interface for customizing Stripe payment methods.
* Fix - When toggling on the Stripe gateway from the payment methods list, don't incorrectly redirect the merchant to Stripe settings when test mode is enabled.
* Fix - Hiding the expandable menu for UPE entirely when the feature is disabled.
* Fix - Critical error when deactivating the extension after deactivating WooCommerce.
* Fix - Add missing fee and payout information to the order details page in admin.
* Fix - Hiding "Early Access" label and "Refresh payment methods" button when UPE is disabled.
* Fix - Prevent undefined $latest_charge property warnings when signing up to subscriptions with no initial payment (eg free trials).
* Fix - Wrong status when purchasing a pre-order product with a new payment method.
* Tweak - Orders with `trash` status are not retrieving anymore when calling `get_order_by_intent_id` function.
* Tweak - Hide Stripe secret keys in the UI.
* Fix - Resolved failing payments when statement descriptor prefix starts with a number.