[FIX] sms: correctly support not mail.thread / void model in composer
[FIX] sms: correctly support not mail.thread / void model in composer

SMS composer would like to support sending message to not mail.thread models
or support direct recipients as default / create. However issues in the code
prevent to effectively support that.

Related to task 1922163
Linked to PR #33567
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo