This update simplifies the testing process for our Point of Sale (POS) system. The testing framework has been reorganized to isolate individual steps, making it much easier to identify and resolve any issues. This change improves the reliability and speed of our POS testing.

Following this commit:
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- Initially `test_01_pos_basic_order` now runs multiple tours in parallel.
- Now each tour has been split into its own independent method.
- This separation improves readability and significantly simplifies debugging.

task-5349813

Forward-Port-Of: odoo/odoo#237729

This update enhances how Odoo automatically updates settings related to IAP (In-App Purchases). Specifically, it now includes a unique user identifier (DBUUID) to ensure settings updates are more accurate and reliable, leading to a smoother user experience. This change improves the consistency of settings across the system.

https://github.com/odoo/iap-apps/pull/1309/

This update makes key JavaScript utilities within the 'pos_blackbox_be' module more easily accessible. By allowing these utilities to be imported into other files, the team can streamline future development and improve code organization. This change supports ongoing maintenance and potential enhancements to the point-of-sale system.

This commit puts export in front of some of the blackbox js utils/services/constants to make them importable from other files in the future.

Forward-Port-Of: odoo/enterprise#99445
Forward-Port-Of: odoo/enterprise#99391