Flaky test reporter reports severity of flakiness in Slack

[chaodaiG]

Active flaky tests are reported as a list in Slack, provides a nice overview of which tests are flaky, but it's still not easy to determine how bad it is without clicking any link. It would be nice to show the severity of each test, for example failed 6/10 runs, or grade based on ratio such as low: 1-2, medium: 3-5, bad: 6-9, failed: 10

[knative-housekeeping-robot]

Issues go stale after 90 days of inactivity.
Mark the issue as fresh by adding the comment /remove-lifecycle stale.
Stale issues rot after an additional 30 days of inactivity and eventually close.
If this issue is safe to close now please do so by adding the comment /close.

Send feedback to Knative Productivity Slack channel or file an issue in knative/test-infra.

/lifecycle stale

[knative-housekeeping-robot]

Stale issues rot after 30 days of inactivity.
Mark the issue as fresh by adding the comment /remove-lifecycle rotten.
Rotten issues close after an additional 30 days of inactivity.
If this issue is safe to close now please do so by adding the comment /close.

Send feedback to Knative Productivity Slack channel or file an issue in knative/test-infra.

/lifecycle rotten

[chizhg]

/remove-lifecycle rotten

[knative-housekeeping-robot]

Issues go stale after 90 days of inactivity.
Mark the issue as fresh by adding the comment /remove-lifecycle stale.
Stale issues rot after an additional 30 days of inactivity and eventually close.
If this issue is safe to close now please do so by adding the comment /close.

Send feedback to Knative Productivity Slack channel or file an issue in knative/test-infra.

/lifecycle stale

[chizhg]

/lifecycle frozen