[FIX] hr_holidays: leaves left
[FIX] hr_holidays: leaves left

The stat button "Leaves Left" is a computed field of type integer.
However, it aggregates the data of `number_of_days`, which is a float.
Since the field is not stored, we can change its type.

opw-743153

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo