title: Airflow Sensor in reschedule mode, does not trigger sla miss
body: <p>I have a sensor under <code>reschedule</code> mode, and I also set a <code>sla</code> for this sensor. What I hope to happen is, if the sensor does not return success in 5 mins, it will be considered missing an sla and will send out an email. The problem is, currently it does not do anything. I'm guessing the problem is the sensor quickly turns to <code>up_for_reschedule</code> state thus was not considered missing an sla? How can I set/trigger <code>sla</code> for <code>sensor</code> under <code>reschedule</code> mode? Thanks a lot for your help.</p>
  <pre><code>dag = DAG(
         schedule_interval = &quot;0, 10, 20, 30, 40, 50 * * * *&quot;,
         catch_up= False,
         default_args = {
             &quot;start_date&quot; :datetime(2021,06,12),
             &quot;email&quot; : &quot;someemail@someplace.com&quot;
         })
  In sensor setting:
        sla = timedelta (minutes = 5)
        &quot;poke_interval&quot;: 60*10
        &quot;timeout&quot; : 60*60*12
        &quot;mode&quot; : &quot;reschedule&quot;
  </code></pre>