Adds a helpful tooltip when the Incoterms list is empty, giving users clearer guidance in the Inventory area. This improves the first-use experience by explaining what the empty list means instead of leaving the page without context.

Description of the issue/feature this PR addresses:
Task: https://www.odoo.com/web#id=34500&view_type=form&model=project.task&action=333&active_id=131&menu_id=4720
Pad: https://pad.odoo.com/p/r.0e106408f4e507d54f62c0294857ccab

Current behavior before PR:
    - In incoterms has no any tooltip
Desired behavior after PR is merged:
    - Add a view tooltip in incoterms
    - It will appear when the list of incoterms is empty


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This update improves the explanatory tooltips around accounting lock dates so users better understand how restrictions apply. It also reorganizes related lock-date validation into a dedicated module, making the behavior easier to maintain without changing the business workflow.

-task: https://www.odoo.com/web#id=38178&view_type=form&model=project.task&action=333&active_id=967&menu_id=4720

Description of the issue/feature this PR addresses:

Current behavior before PR:

Desired behavior after PR is merged:


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The test mail setup now uses production-like email alias settings during automated checks. This helps ensure mail-related behavior is validated more accurately and may also make some performance measurements more efficient.

Odoo will no longer generate translation data for languages that are marked as not translatable. This reduces unnecessary processing and helps keep translation handling cleaner without changing normal user workflows.

Followup of #9479