[FIX] hr_holidays_attendance: check overtime deductible during write

Steps to reproduce:
- install Time Off and Attendances apps;
- making sure an employee doesn't have extra hours;
- create a time off type which is "Deduct Extra Hours" (A);
- create a time off type which is not "Deduct Extra Hours" (B);
- create a time off with the type (A);
- save;
- edit the time off with the type (B);
- save.

Issue:
The time off is modified and it is possible to approve it.

Solution:
Check that the employee has enough extra hours
if the type of time off used is "Deduct Extra Hours".

opw-3141108

closes odoo/odoo#111043

Signed-off-by: Kevin Baptiste <kba@odoo.com>