odoo/industry#2308

Created by fw-bot

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odoo-dev:master-saas-19.2-booking_engine_kanban_view_owl_error-fix-dhvag-535034-fw

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8f1d74e861b2fd88a8d96b4a5bc10de967635dbf

[FIX] booking_engine: prevent Owl error in hotel planning kanban

Steps to Reproduce:
1. Go to Apps → Industry → Install Hotel (load demo data).
2. Open Hotel App.
3. Switch to the Kanban view.

Result:
<img width="978" height="710" alt="image" src="https://github.com/user-attachments/assets/247cc2a3-ac8f-4672-9dd2-2c96e0ce999b" />

Cause of the Issue:

• The sale_planning module adds the sale_line_id field.

• Then, the booking_engine module removes the sale_line_id field from the kanban field declarations.

• However, the sale section remains in the final template and still references: record.sale_line_id.raw_value

As a result:
Since sale_line_id is no longer loaded in the kanban record payload, the template attempts to access record.sale_line_id.raw_value on an undefined value, resulting in an OwlError.

With this commit:
Remove the corresponding sale section when removing sale_line_id. This keeps the kanban template consistent with the loaded fields and prevents the OwlError.

opw-6261815

Forward-Port-Of: #2301