This update allows other Odoo modules to customize how SLAs are defined for helpdesk tickets. Previously, this customization was limited, but now it's expanded to align with existing flexible configurations. This improves the flexibility and adaptability of SLAs within the helpdesk system.

Allow other modules to modify the _sla_find domain when adding SLAs to helpdesk tickets.

This is already the case for extra and false domains, while the main domain is hardcoded up to this commit.

Forward-Port-Of: odoo/enterprise#97501