Odoo removed an obsolete report configuration field that is no longer used to generate QWeb reports. This cleanup reduces redundant setup across many reporting areas without changing how users create, view, or print reports.

The `report_file` field on `ir.actions.report` is no longer used by the QWeb
reporting engine. QWeb reports rely on `report_name` to locate and render the
template. This commit removes this redundant field from report actions.

Enterprise PR:- https://github.com/odoo/enterprise/pull/123831
Upgrade PR:- https://github.com/odoo/upgrade/pull/10750

Odoo is removing an obsolete report setting that is no longer used to generate QWeb reports. Reports now rely on the existing report name setting, reducing redundant configuration with no expected change to normal reporting behavior.