Notices are triggered due to scheduling AS jobs too early

[vladolaru]

Describe the bug

Sometimes we try to schedule ActionScheduler jobs via the WC_Payments_Action_Scheduler_Service::schedule_job() method before the ActionScheduler was properly initialized. This triggers a "doing it wrong" notice (see ActionScheduler::is_initialized()).

To Reproduce

Most consistently, this can be reproduced by clearing the account cache:

1. Make sure you have WP_DEBUG active
2. Go to WP admin > WCPay Dev Tools and clear the account cache
3. You should see a notice at the top of the page:

Notice: Function as_has_scheduled_action was called incorrectly. as_has_scheduled_action() was called before the Action Scheduler data store was initialized Please see [Debugging in WordPress](https://developer.wordpress.org/advanced-administration/debug/debug-wordpress/) for more information. (This message was added in version 3.1.6.)

Additional context

p1719838546986229-slack-C03KTTK2YMA