[IMP] sale_timesheet: extract preparation of values for task creation
[IMP] sale_timesheet: extract preparation of values for task creation

It allows to customize the values of the task created from a
procurement.

Closes #16387
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo