[IMP] mail : use email_normalized in mail_channel _notify_email_recipients
[IMP] mail : use email_normalized in mail_channel _notify_email_recipients

If recipient has email like 'A <a@a.com>', the email_to returned by this
method will be incorrectly formatted. -> 'A <A <a@a.com>>'
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo