WooCommerce Subscriptions 6.9.0

* Fix: Offset subscription next payment date calculations based on site time. All dates still remain in UTC, but calculations on the 1st and last day of the month will now take into account the site timezone. PR#3708
* Fix: Only attempt to display the customer notice when updating the default token from the My Account page. PR#3799
* Fix: Prefix variation attributes with `attribute_` when setting up renewal carts. PR#3809
* Dev: Add a new hook to the change_users_subscription() function - this hook is triggered before the status change. PR#3787

* Tweak: Remove the '$X now' from price string when synced product sign up date is today. PR#3797
* Fix: Treat a subscription with a cancelled parent order as "needing payment". This ensures cancelling the subscription will go right to cancelled, rather than pending-cancellation. PR#3784
* Fix: Remove code responsible for hiding/showing the WC order totals meta box. This fixes the deprecated jQuery.fn.load() warnings. PR#3786
* Fix: Fix updating status and end dates via the REST API. PR#3796
* Dev: Add an action hook to edit subscription admin payment meta inputs. Enables third-parties to display custom fields for each gateway. PR#3798
* Dev: Opt-in tracking data for Subscriptions Reports PR#3738
Data sent to WooCommerce:
Subscriptions report views
Subscriptions report filter usage - clicks and report range
Number of subscriptions, orders, products
Plugin version
To disable this tracking, opt-out of WooCommerce tracking, see WooCommerce Usage Tracking - WooCommerce

* Fix: Prevent possible errors caused by inaccessible get_current_screen() function. PR#3678
* Fix: Decouple single_add_to_cart_text() from add_to_cart_text() and remove double and incorrect filtering. PR#3705
* Fix: Account for the pre-paid term when canceling a subscription which is on-hold without a required payment. PR#3726
* Fix: [WC4.4] Replace uses of `get_product_from_item()` with `$item->get_product()`. PR#3769
* Fix: [WC4.4] Deprecate use of the WC_Cart::tax_display_cart. PR#3741
* Fix: [WC4.4] Update WC_Product_Variable_Subscription::get_available_variations() function signature. PR#3761
* Fix: [WC4.0] Use the WC version appropriate hook to override the text explaining uneditable subscriptions. PR#3678
* Fix: [WP5.5] Add permission callback for the REST statuses endpoint. PR#3765
* Fix: [WP5.5] Remove the post box header from edit subscription meta boxes #3771
* Performance: Validate product type changes on large sites to avoid running queries on edit product page loads. PR#3699
* Tweak: [WC Code Standards] Fixes for i18n-related issues. PR#3757