Currently some auto_reply templates are internal as a means to prevent
notifying users everytime we send a reply to somebody.
This raises the issue that since responses to internal notifications
are themselves internal notifications, often nobody will be notified of
responses to these automated messages.
We fix this by marking these messages as auto_comments, which will
ensure responses to these messages are
considered non-internal (and thus 'discussions', by default).
task-2834304
closesodoo/odoo#94018
Related: odoo/enterprise#35466
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>