triage-policies: Add a bot exception mechanism

So we can prevent the bot to act in some cases.
3 jobs from triage-improvements in 15 minutes and 48 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #187352
flatpak devel

00:14:50

9.2%
 
  Deploy
passed #187353
review

00:00:57

manual #187354
allowed to fail manual
stop_review