opws: 2269230, 2248760
When a database has a lot of projects with many tasks, and needs
to send a lot of feedback mails, the cron tries to send mails to
all tasks at the same time, thus it times out.
This fix will allow to treat projects one at a time so that when
the cron times out, it will not restart from the beginning.
closesodoo/odoo#53922
X-original-commit: 07c828b48741500573b4286480b23752a28163c7
Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>