In resource, calendar.attendances with a resource_id specified
were taken into account to compute the average hours per day.
This is incorrect and could lead to hours_per_day being > 24h.
Also when hr_payroll is installed, attendance_ids is replaced
by normal attendance (those without a resource_id set) in the view.
The onchange method was not called to recompute the average hours per day.
This commit fixes both issues.
closesodoo/odoo#29951
Lucas Lefèvre
f6b1e3144b