Deadman alert is not executing and not sending alerts to slack

__Steps to reproduce:__
List the minimal actions needed to reproduce the behavior.

1. create a task and store the output of the task in a different bucket.
2. create an alert a deadman alert for the field which you got from the task
3. create notification rule for slack
4. inactive the task

__Expected behavior:__
When the task becomes inactive it won't do any calculation so for deadman alert it should alert cric for this problem.

__Actual behavior:__
it showing nothing no history at all.

__Environment info:__
InfluxDB 2.0.1

__Config:__
Copy any non-default config values here or attach the full config as a gist or file.


You can see in the first pic I have chosen the measurement, field, and one tag which came as a result of the task. When I make that task inactive I should get the alert but I am not getting the same.
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No files or tests are named. Reproduce the task, deadman alert, Slack notification rule, and inactive-task workflow described in the issue, then inspect the alert history and notification behavior. Done means the inactive task produces a deadman alert and sends it to Slack.

Written by the indexing model from the issue text.