Steps to reproduce the issue

This is just a reminder on the remaining mail types to be converted to mail templates after PR #28722 has been merged.

Expected result

All kinds of mails sent by the core are using mail templates.

Actual result

Done:

• Testmail in global configuration (done with PR #22126 )
• Contact form in com_contact (done with PR #28722 )
• com_contact API controller to send a mail (done with PR #28722 )
• Joomla Updatenotification (done with PR #28722 )
• Massmailer mail (done with PR #28722 )
• Mail to the new user when creating a new user in the backend (done with PR #28722 )
• Password reset for users in frontend (done with PR #28722 )
• Username reminder for users in frontend (done with PR #28722 )

To be done:

• Notification mail from com_actionlogs (administrator\components\com_actionlogs\src\Model\ActionlogModel.php line 174)
• com_messages notification (administrator\components\com_messages\src\Model\MessageModel.php line 435)
• com_privacy send export to user (administrator\components\com_privacy\src\Model\ExportModel.php line 240)
• com_privacy notification about a new request (administrator\components\com_privacy\src\Model\RequestModel.php line 362)
• com_privacy creating a new request (components\com_privacy\src\Model\RequestModel.php line 188/190 ATTENTION!! HERE IS A BUG! The mail is send twice!)
• reminder of expiring privacy consent (plugins\system\privacyconsent\privacyconsent.php line 604)
• User registration (components\com_users\src\Model\RegistrationModel.php line 198, 254, 650, 711)