This change updates automated tests in Knowledge, Web Studio, and AI so they work with the latest plugin setup. It helps keep the test suite passing and ensures future changes in these areas are validated correctly.

\* = knowledge, web_studio, ai

- Update tests to use withPlugins/basePlugins
- Update manual plugin list usage

Community PR: https://github.com/odoo/odoo/pull/259303
task-6014100

This change moves a shared address-splitting helper into a more central location used by several local reporting modules. It does not change business behavior, but it simplifies maintenance and keeps the affected country-specific reports aligned on the same logic.

https://github.com/odoo/odoo/pull/269676