[IMP] hr_holidays: improve inheritance
[IMP] hr_holidays: improve inheritance

Improve inheritance on allocation creation by employee's tag.

opw-728620
Closes #16402

ygol/odoo,hip-odoo/odoo,ygol/odoo,hip-odoo/odoo,ygol/odoo,hip-odoo/odoo,ygol/odoo,hip-odoo/odoo,ygol/odoo,ygol/odoo,hip-odoo/odoo,ygol/odoo,hip-odoo/odoo