[FIX] mail: respect 'scheduled_date' for push notifications (backport)

Backport of odoo/odoo@1955c55f86

Sending notifications can be delayed by giving 'scheduled_date' as parameter
for notification process. This is used notably when a process in several
steps should wait for some user input before sending notifications e.g.
rating feedback and update done in two steps.

Sending web push notifications should respect this scheduling as already
done by inbox and email notifications.

Task-3695571
Related to Task-3669738 (Mail: Web Push Models Rename and Fixes)

Part-of: odoo/odoo#150011

addons/mail/models/mail_thread.py

@@ -3080,11 +3080,11 @@ class MailThread(models.AbstractModel):
             })
         else:
             # generate immediately the <mail.notification>
-            # and send the <mail.mail> and the <bus.bus> notifications
+            # and send the <mail.mail>, <mail.push> and the <bus.bus> notifications
             self._notify_thread_by_inbox(message, recipients_data, msg_vals=msg_vals, **kwargs)
             self._notify_thread_by_email(message, recipients_data, msg_vals=msg_vals, **kwargs)
+            self._notify_thread_by_web_push(message, recipients_data, msg_vals, **kwargs)
 
-        self._notify_thread_by_web_push(message, recipients_data, msg_vals, **kwargs)
         return recipients_data
 
     def _notify_thread_by_inbox(self, message, recipients_data, msg_vals=False, **kwargs):