message_post_with_sms method allow to give either numbers, either partners
or to fall back on default computation. Giving explicit partners does not
work because of wrong indentation in code not fetching their numbers.
Related to task 1922163
Linked to PR #33567
Purpose of this commit is to give description more "business oriented"
because those descriptions appears in Odoo Studio which is supposed to be used by end users, not only by developers.
Related Task ID : 37311
Christophe Simonis