Fixed consumable checkout via API not sending notification

[marcusmoore]

Description

This PR fixes a bug where checkout notifications are not sent to users when a consumable is checked out via the API. Like in #14181, I added tests for the web and API controller methods but really only the api test for testUserSentNotificationUponCheckout() fails without the change in the controller (firing the CheckoutableCheckedOut event).

This PR follows up on #14181 and fixes #13782

Type of change

• Bug fix (non-breaking change which fixes an issue)

[shortcut-integration]

This pull request has been linked to Shortcut Story #24685: Consumable Checkout emails are not being sent when checked out via API.

[what-the-diff]

PR Summary

• Introduction of Event to ConsumablesController
  Updated ConsumablesController with the ability to handle CheckoutableCheckedOut events.

• Addition of New Fabrication Methods
  The 'ConsumableFactory' has two newly added methods named withoutItemsRemaining() and requiringAcceptance(), enhancing how consumables are fabricated in our code.

• Implementation of Consumable Checkout Tests
  A new test suite ConsumableCheckoutTest is introduced to check the basic checkout process of a consumable. It independently verifies each step such as the validation process in checkout, consumable availability at checkout, along with the creation of an action log and notification dispatch.

• Refactoring of Accessory Checkout Validation Test
  Improved the readability of our test suites by renaming the test case from testValidation() to testValidationWhenCheckingOutAccessory() in AccessoryCheckoutTest.

• Addition of Missing Components in Test Suites
  Updated test files tests/Feature/Api/Consumables/ConsumableCheckoutTest and tests/Feature/Checkouts/AccessoryCheckoutTest, each with a missing line to create a new consumable before the test runs. This ensures our test suites are self-contained and do not depend on external entities.

[marcusmoore]

@snipe friendly ping for a review 😄