[FIX] crm: make sure there is a create date when computing date_open
[FIX] crm: make sure there is a create date when computing date_open

Display the field date_open in the crm.lead form view
Create a new record

Before this commit, there was a crash because since the record is a virtual one
there is no create_date, hence the crash

After this commit, we make sure we select records that have a create_date, and there is no crash

OPW 1877080
closes #26499

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