https://github.com/openshift/origin/pull/25475/files marked our tests for ISI as Disruptive.
Tests should wait until operators become stable, otherwise other tests will be run on an unstable cluster and it'll cause flakes.
- The tests wait until operators stable after image.config changes.
- The tests is no longer [Disruptive].
- If tests are slow (it depends on other operator, but MCO tends to be slow), they should be [Slow].