When 'getadresses' fails at parsing some input and give us a result like
'gmail.com' (see previous commit adding test cases) we fallback on using
'email_re' which is better at finding email addresses in a global string.
We use it only in this specific case as fallback mechanism to rely on
'getadresses' when possible.
Task-3572208
X-original-commit: odoo/odoo@8e61a3b690
Part-of: odoo/odoo#141856