This update resolves an issue where leave settings were incorrectly available when the time-off application wasn't used. The related code has been moved to a dedicated bridge module for better organization and to ensure functionality aligns with installed applications. This improves the overall stability and accuracy of leave calculations.

Issue:
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The 'leave' and 'public_leave' values of 'hr.attendance.overtime.rule.timing_type' should not be available when time off app isn't installed. This PR also moves the `leave` and `public_leave` code to the `hr_holidays_attendance` bridge.

odoo/odoo#259386
enterprise-108725
upgrade-9574
task-5942798

This update removes an outdated feature, `onWillUpdateProps`, which is no longer supported in the newer OWL3 version of Odoo. This change ensures the system continues to function correctly with the latest Odoo release, maintaining stability and performance. No functional changes were made.