The test suite was updated to reflect a new rule that prevents the same bank account number from being assigned to multiple active partners. This keeps enterprise modules aligned with the latest accounting behavior and helps avoid future test failures when validating customer and partner bank details.

Following the community change, we now prevents assigning the same bank account number to multiple active partners.
This commit updates the affected enterprise test cases to align with the new behaviour

sees community  pr- https://github.com/odoo/odoo/pull/234531 
task- 5236503