[FIX] hr_holidays: numerical error
[FIX] hr_holidays: numerical error

In some exceptional circumstances, the computation of the remaining
leaves might lead to numerical errors, e.g. a very small but non-zero
number (e.g. 10^-17)

This value will be displayed in the name of the leave type because of
the `%g` used in the string format. To avoid breaking the translation,
we round the value.

opw-1935232

closes odoo/odoo#31245
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo